2 Samuel 16:21

Ahithophel said to Absalom , Go in to your father’s concubines , whom he has left to keep the house , and all Israel will hear that you have made yourself a stench to your father , and the hands of all who are with you will be strengthened .

Ahithophel answered, “Sleep with your father`s concubines whom he left to take care of the palace. Then all Israel will hear that you have made yourself obnoxious to your father, and the hands of everyone with you will be more resolute.”

And Ahithophel said unto Absalom, Go in unto thy father's concubines, which he hath left to keep the house; and all Israel shall hear that thou art abhorred of thy father : then shall the hands of all that are with thee be strong.