New Revised Standard Version
But afterward, David was stricken to the heart because he had numbered the people. David said to the LORD, “I have sinned greatly in what I have done. But now, O LORD, I pray you, take away the guilt of your servant; for I have done very foolishly.”

Contemporary English Version
After everyone had been counted, David realized he had done wrong. He told the LORD, "What I did was stupid and terribly wrong. LORD, please forgive me."

New American Bible
Afterward, however, David regretted having numbered the people. David said to the LORD: “I have sinned grievously in what I have done. Take away, LORD, your servant’s guilt, for I have acted very foolishly.”

Douay-Rheims Bible
But David's heart struck him, after the people were numbered: and David said to the Lord: I have sinned very much in what I have done: but I pray thee, O Lord, to take away the iniquity of thy servant, because I have done exceeding foolishly.

But David's heart struck him, after the people were numbered: and David said to the Lord: I have sinned very much in what I have done: but I pray thee, O Lord, to take away the iniquity of thy servant, because I have done exceeding foolishly.

David's heart

1 Samuel 24:5 After which David's heart struck him, because he had cut off the hem of Saul's robe.

John 8:9 But they hearing this, went out one by one, beginning at the eldest. And Jesus alone remained, and the woman standing in the midst.

1 John 3:20,21 For if our heart reprehend us, God is greater than our heart and knoweth all things. . . .

I have sinned

2 Samuel 12:13 And David said to Nathan: I have sinned against the Lord. And Nathan said to David: The Lord also hath taken away thy sin: thou shalt not die.

1 Chronicles 21:8 And David said to God: I have sinned exceedingly in doing this: I beseech thee take away the iniquity of thy servant, for I have done foolishly.

2 Chronicles 32:26 And he humbled himself afterwards, because his heart had been lifted up, both he and the inhabitants of Jerusalem: and therefore the wrath of the Lord came not upon them in the days of Ezechias.

Job 33:27,28 He shall look upon men, and shall say: I have sinned, and indeed I have offended, and I have not received what I have deserved. . . .

Psalm 32:5 I have acknowledged my sin to thee, and my injustice I have not concealed. I said I will confess against my self my injustice to the Lord: and thou hast forgiven the wickedness of my sin.

Proverbs 28:13 He that hideth his sins, shall not prosper: but he that shall confess, and forsake them, shall obtain mercy.

Micah 7:8,9 Rejoice not, thou my enemy, over me, because I am fallen: I shall arise, when I sit in darkness, the Lord is my light. . . .

1 John 1:9 If we confess our sins, he is faithful and just, to forgive us our sins and to cleanse us from all iniquity.

take away

Job 7:21 Why dost thou not remove my sin, and why dost thou not take away my iniquity? Behold now I shall sleep in the dust: and if thou seek me in the morning, I shall not be.

Hosea 14:2 Take with you words, and return to the Lord, and say to him: Take away all iniquity, and receive the good: and we will render the calves of our lips.

John 1:29 The next day, John saw Jesus coming to him; and he saith: Behold the Lamb of God. Behold him who taketh away the sin of the world.

foolishly

2 Samuel 12:13 And David said to Nathan: I have sinned against the Lord. And Nathan said to David: The Lord also hath taken away thy sin: thou shalt not die.

Deuteronomy 32:6 Is this the return thou makest to the Lord, O foolish and senseless people? Is not he thy father, that hath possessed thee, and made thee, and created thee?

1 Samuel 13:13 And Samuel said to Saul: Thou hast done foolishly, and hast not kept the commandments of the Lord thy God, which he commanded thee. And if thou hadst not done thus, the Lord would now have established thy kingdom over Israel for ever:

1 Samuel 26:21 And Saul said: I have sinned; return, my son David, for I will no more do thee harm, because my life hath been precious in thy eyes this day: for it appeareth that I have done foolishly, and have been ignorant in very many things.

2 Chronicles 16:9 For the eyes of the Lord behold all the earth, and give strength to those who with a perfect heart trust in him. Wherefore thou hast done foolishly, and for this cause from this time wars shall arise against thee.

Mark 7:22 Thefts, covetousness, wickedness, deceit, lasciviousness, an evil eye, blasphemy, pride, foolishness.

Titus 3:3 For we ourselves also were some time unwise, incredulous, erring, slaves to divers desires and pleasures, living in malice and envy, hateful and hating one another.