Charles Ellicott Commentary 2 Samuel 15:32

"And it came to pass, that, when David was come to the top [of the ascent], where God was worshipped, behold, Hushai the Archite came to meet him with his coat rent, and earth upon his head." — 2 Samuel 15:32 (ASV)

Where he worshipped God. —Rather, where men worship. The original indicates a customary act. David had taken the road over the crest of the Mount of Olives, and there, in all probability, was one of those “high places” which abounded in Israel.

Hushai the Archite. —His place is mentioned in Joshua 16:2 as on the border between Ephraim and Benjamin, and he may have been at his own home when the rebellion broke out. His coming appears as the beginning of the answer to David’s prayer in 2 Samuel 15:31.