NET

6 The priests stood in their assigned spots, along with the Levites who had the musical instruments used for praising the Lord. (These were the ones King David made for giving thanks to the Lord and which were used by David when he offered praise, saying, “Certainly his loyal love endures.”) Opposite the Levites, the priests were blowing the trumpets, while all Israel stood there.

Darby

6 And the priests stood in their charges, and the Levites with Jehovah's instruments of music, which David the king had made to praise Jehovah, for his loving-kindness [endureth] for ever, when David praised by their means; and the priests sounded the trumpets opposite to them, and all Israel stood.

KJV

6 And the priests waited on their offices: the Levites also with instruments of musick of the LORD, which David the king had made to praise the LORD, because his mercy [endureth] for ever, when David praised by their ministry; and the priests sounded trumpets before them, and all Israel stood.