New Revised Standard Version
But when he saw many Pharisees and Sadducees coming for baptism, he said to them, “You brood of vipers! Who warned you to flee from the wrath to come?

Contemporary English Version
Many Pharisees and Sadducees also came to be baptized. But John said to them: You bunch of snakes! Who warned you to run from the coming judgment?

New American Bible
When he saw many of the Pharisees and Sadducees coming to his baptism, he said to them, “You brood of vipers! Who warned you to flee from the coming wrath?

Douay-Rheims Bible
And seeing many of the Pharisees and Sadducees coming to his baptism, he said to them: Ye brood of vipers, who hath shewed you to flee from the wrath to come?

And seeing many of the Pharisees and Sadducees coming to his baptism, he said to them: Ye brood of vipers, who hath shewed you to flee from the wrath to come?

the Pharisees.

Matthew 5:20 For I tell you, that unless your justice abound more than that of the scribes and Pharisees, you shall not enter into the kingdom of heaven.

Matthew 12:24 But the Pharisees hearing it, said: This man casteth not out devils but by Beelzebub the prince of the devils.

Matthew 15:12 Then came his disciples, and said to him: Dost thou know that the Pharisees, when they heard this word, were scandalized?

Matthew 16:6,11,12 Who said to them: Take heed and beware of the leaven of the Pharisees and Sadducees. . . .

Matthew 22:15,23,34 Then the Pharisees going, consulted among themselves how to insnare him in his speech. . . .

Matthew 23:13 But woe to you, scribes and Pharisees, hypocrites, because you shut the kingdom of heaven against men: for you yourselves do not enter in and those that are going in, you suffer not to enter.

*etc:

Mark 7:3-5 For the Pharisees and all the Jews eat not without often washing their hands, holding the tradition of the ancients. . . .

Mark 8:15 And he charged them saying: Take heed and beware of the leaven of the Pharisees and of the leaven of Herod.

Mark 12:13,18 And they sent to him some of the Pharisees and of the Herodians: that they should catch him in his words. . . .

Luke 7:30 But the Pharisees and the lawyers despised the counsel of God against themselves, being not baptized by him.

Luke 11:39-44 And the Lord said to him: Now you, Pharisees, make clean the outside of the cup and of the platter: but your inside is full of rapine and iniquity. . . .

Luke 16:14 Now the Pharisees, who were covetous, heard all these things: and they derided him.

Luke 18:11 The Pharisee standing, prayed thus with himself: O God, I give thee thanks that I am not as the rest of men, extortioners, unjust, adulterers, as also is this publican.

John 1:24 And they that were sent were of the Pharisees.

John 7:45-49 The ministers therefore came to the chief priests and the Pharisees. And they said to them: Why have you not brought him? . . .

John 9:40 And some of the Pharisees, who were with him, heard: and they said unto him: Are we also blind?

Acts 4:1,2 And as they were speaking to the people the priests and the officer of the temple and the Sadducees came upon them, . . .

Acts 5:17 Then the high priest rising up, and all they that were with him (which is the heresy of the Sadducees) were filled with envy.

Acts 15:5 But there arose of the sect of the Pharisees some that believed, saying: They must be circumcised and be commanded to observe the law of Moses.

Acts 23:6-9 And Paul, knowing that the one part were Sadducees and the other Pharisees, cried out in the council: Men, brethren, I am a Pharisee, the son of Pharisees: concerning the hope and resurrection of the dead I am called in question. . . .

Acts 26:5 Having known me from the beginning (if they will give testimony) that according to the most sure sect of our religion I lived, a Pharisee.

O generation.

Matthew 12:34 O generation of vipers, how can you speak good things, whereas you are evil? for out of the abundance of the heart the mouth speaketh.

Matthew 23:33 You serpents, generation of vipers, how will you flee from the judgment of hell?

Genesis 3:15 I will put enmities between thee and the woman, and thy seed and her seed: she shall crush thy head, and thou shalt lie in wait for her heel.

Psalm 58:3-6 The wicked are alienated from the womb; they have gone astray from the womb: they have spoken false things. . . .

Isaiah 57:3,4 But draw near hither, you sons of the sorceress, the seed of the adulterer, and of the harlot. . . .

Isaiah 59:5 They have broken the eggs of asps, and have woven the webs of spiders: he that shall eat of their eggs, shall die: and that which is brought out, shall be hatched into a basilisk.

Luke 3:7-9 He said therefore to the multitudes that went forth to be baptized by him: Ye offspring of vipers, who hath shewed you to flee from the wrath to come? . . .

John 8:44 You are of your father the devil: and the desires of your father you will do. He was a murderer from the beginning: and he stood not in the truth, because truth is not in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father thereof.

1 John 3:10 In this the children of God are manifest, and the children of the devil. Whosoever is not just is not of God, or he that loveth not his brother.

Revelation 12:9,10 And that great dragon was cast out, that old serpent, who is called the devil and Satan, who seduceth the whole world. And he was cast unto the earth: and his angels were thrown down with him. . . .

who.

Jeremiah 6:10 To whom shall I speak? and to whom shall I testify, that he may hear? behold, their ears are uncircumcised, and they cannot hear: behold the word of the Lord is become unto them a reproach: and they will not receive it.

Jeremiah 51:6 Flee ye from the midst of Babylon, and let every one save his own life: be not silent upon her iniquity: for it is the time of revenge from the Lord, he will render unto her what she hath deserved.

Ezekiel 3:18-21 If, when I say to the wicked, Thou shalt surely die: thou declare it not to him, nor speak to him, that he may be converted from his wicked way, and live: the same wicked man shall die in his iniquity, but I will require his blood at thy hand. . . .

Ezekiel 33:3-7 And he sees the sword coming upon the land, and sound the trumpet, and tell the people: . . .

Acts 20:31 Therefore watch, keeping in memory that for three years I ceased not with tears to admonish every one of you, night and day.

Romans 1:18 For the wrath of God is revealed from heaven against all ungodliness and injustice of those men that detain the truth of God in injustice:

Hebrews 11:7 By faith Noe, having received an answer concerning those things which as yet were not seen, moved with fear, framed the ark for the saving of his house: by the which he condemned the world and was instituted heir of the justice which is by faith.

flee.

Romans 5:9 Christ died for us. Much more therefore, being now justified by his blood, shall we be saved from wrath through him.

1 Thessalonians 1:10 And to wait for his Son from heaven (whom he raised up from the dead), Jesus, who hath delivered us from the wrath to come.

2 Thessalonians 1:9,10 Who shall suffer eternal punishment in destruction, from the face of the Lord and from the glory of his power: . . .

Hebrews 6:18 That by two immutable things in which it is impossible for God to lie, we may have the strongest comfort, we who have fled for refuge to hold fast the hope set before us.

Revelation 6:16,17 And they say to the mountains and the rocks: Fall upon us and hide us from the face of him that sitteth upon the throne and from the wrath of the Lamb. . . .