2 Samuel 15:27-31

The king also said to Zadok the priest, “Are you not a seer? Return to the city in peace, and your two sons with you, your son Ahimaaz and Jonathan the son of Abiathar.

See, I am going to wait at the river crossing places of the wilderness until word comes from you to inform me.”

So Zadok and Abiathar returned the ark of God to Jerusalem and remained there.

And David was going up the ascent of the Mount of Olives, weeping as he went, and his head was covered, and he was walking barefoot. Then all the people who were with him each covered his own head, and they were going up, weeping as they went.

Now someone informed David, saying, “Ahithophel is among the conspirators with Absalom.” And David said, “Lord, please make the advice of Ahithophel foolish.”