Set over the service of song. — Literally, made stand by the sides (hands) of song, as if to minister to the sacred music. (Comp. 1 Chronicles 25:2-3, where the same peculiar phrase recurs, and Psalms 123:2, “as the eyes of slaves are unto the hand of their Lord.” Comp. also the common heading of the Psalms, “to the conductor or precentor;” Authorised Version, “chief musician.”)
In the house of the Lord. — In David’s time, a tent, as next verse declares.
After that the ark had rest. — Perhaps locative: at the restin-place of the Ark (comp. Genesis 8:9). From the time of its capture by the Philistines (2 Samuel 6:17), the Ark had no certain dwelling till it was lodged in the tent which David spread for it on Mount Zion.