The text should be read as: when David came to the top of the mount where people worship God. The word “top” here, and in [Reference 2 Sam…

Where he worshipped God. —Rather, where men worship. The original indicates a customary act. David had taken the road ove…

Here was an immediate answer to David's prayer, for the very man, who alone could deal effectively with Ahithophel, comes to the king.

And it came to pass, that [when] David had come to the top [of
the mount]
Of the moun…

David prays not against Ahithophel's person, but against his counsel. He prayed this, in firm belief that God has all hearts in His hand, and tongu…