New Revised Standard Version
Ahithophel said to Absalom, “Go in to your father’s concubines, the ones he has left to look after the house; and all Israel will hear that you have made yourself odious to your father, and the hands of all who are with you will be strengthened.”

Contemporary English Version
Ahithophel answered, "Some of your father's wives were left here to take care of the palace. You should have sex with them. Then everyone will find out that you have publicly disgraced your father. This will make you and your followers even more powerful."

New American Bible
Ahithophel replied to Absalom: “Go to your father’s concubines, whom he left behind to take care of the palace. When all Israel hears how odious you have made yourself to your father, all those on your side will take courage.”

Douay-Rheims Bible
And Achitophel said to Absalom: Go in to the concubines of thy father, whom he hath left to keep the house: that when all Israel shall hear that thou hast disgraced thy father, their hands may be strengthened with thee.

And Achitophel said to Absalom: Go in to the concubines of thy father, whom he hath left to keep the house: that when all Israel shall hear that thou hast disgraced thy father, their hands may be strengthened with thee.

Go in

Genesis 6:4 Now giants were upon the earth in those days. For after the sons of God went in to the daughters of men, and they brought forth children, these are the mighty men of old, men of renown.

Genesis 38:16 And going to her, he said: Suffer me to lie with thee: for he knew her not to be his daughter-in-law. And she answered: What wilt thou give me to enjoy my company?

unto thy

2 Samuel 12:11 Thus saith the Lord: Behold, I will raise up evil against thee out of thy own house, and I will take thy wives before thy eyes and give them to thy neighbour, and he shall lie with thy wives in the sight of this sun.

2 Samuel 15:16 And the king went forth, and all his household on foot: and the king left ten women his concubines to keep the house:

2 Samuel 20:3 And when the king was come into his house at Jerusalem, he took the ten women his concubines, whom he had left to keep the house, and put them inward, allowing them provisions: and he went not in unto them, but they were shut up unto the day of their death living in widowhood.

Genesis 35:22 And when he dwelt in that country, Ruben went, and slept with Bala the concubine of his father: which he was not ignorant of. Now the sons of Jacob were twelve.

Leviticus 18:8 Thou shalt not uncover the nakedness of thy father's wife: for it is the nakedness of thy father.

Leviticus 20:11 If a man lie with his stepmother, and discover the nakedness of his father, let them both be put to death: their blood be upon them.

1 Kings 2:17,22 And he said I pray thee speak to king Solomon (for he cannot deny thee any thing) to give me Abisag, the Sunamitess, to wife. . . .

1 Corinthians 5:1 It is absolutely heard that there is fornication among you and such fornication as the like is not among the heathens: that one should have his father's wife.

abhorred

Genesis 34:30 And when they had boldly perpetrated these things, Jacob said to Simeon and Levi: You have troubled me, and made me hateful to the Chanaanites and Pherezites, the inhabitants of this land. We are few: they will gather themselves together and kill me; and both I, and my house shall be destroyed.

1 Samuel 13:4 And all Israel heard this report: Saul hath smitten the garrison of the Philistines: and Israel took courage against the Philistines. And the people were called together after Saul to Galgal.

thy father

Genesis 49:3,4 Ruben, my firstborn, thou art my strength, and the beginning of my sorrow; excelling in gifts, greater in command. . . .

then shall

1 Samuel 27:12 And Achis believed David, saying: He hath done much harm to his people Israel: Therefore he shall be my servant for ever.

the hands

2 Samuel 2:7 Let your hands be strengthened, and be ye men of valour: for although your master Saul be dead, yet the house of Juda hath anointed me to be their king.

Zechariah 8:13 And it shall come to pass, that as you were a curse among the Gentiles, O house of Juda, and house of Israel: so will I save you, and you shall be a blessing: fear not, let your hands be strengthened.