Zadok was also there, and all the Levites with him were carrying the ark of the covenant of God. And they set down the ark of God, and Abiathar offered sacrifices until the people had passed out of the city.
Jewish Publication Society of America Version (JPS1917) - 2 Samuel 15:24 >And, lo, Zadok also came, and all the Levites with him, bearing the ark of the covenant of God; and they set down the ark of God — but Abiathar went up — until all the people had done passing out of the city.