I Chronicles 16:37

And Zadok the priest, and his brethren the priests,.... These he left, having appointed them to be before the tabernacle of the Lord, in the high place that was at Gibeon; namely, the tabernacle of Moses, which was removed from Nob thither in the days of Saul, and continued there to the times of Solomon, Ch1 21:28.

The worship of God is not only to be the work of a solemn day now and then, brought in to grace a triumph; but it ought to be the work of every day. David therefore settles it here for a constancy, puts it into a method, which he obliged those that officiated to observe in their respective posts. In the tabernacle of Moses, and afterwards in the temple of Solomon, the ark and the altar were together; but, ever since Eli's time, they had been separated, and still continued so till the temple was built. I cannot conceive what reason there was why David, who knew the law and was zealous for it, did not either bring the ark to Gibeon, where the tabernacle and the altar were, or bring them to Mount Zion, where the ark was. Perhaps the curtains and hangings of Moses's tabernacle were so worn with time and weather that they were not fit to be removed, nor fit to be a shelter for the ark; and yet he would not make all new, but only a tent for the ark, because the time was at hand when the temple should be built. Whatever was the reason, all David's time they were asunder, but he took care that neither of them should be neglected. 1. At Jerusalem, where the ark was, Asaph and his brethren were appointed to attend, to minister before the ark continually, with songs of praise, as every day's work required, Ch1 16:37. No sacrifices were offered there, nor incense burnt, because the altars were not there: but David's prayers were directed as incense, and the lifting up of his hands as the evening sacrifice (Psa 141:2), so early did spiritual worship take place of ceremonial. 2. Yet the ceremonial worship, being of divine institution, must by no means be omitted; and therefore at Gibeon were the altars where the priests attended, for their work was to sacrifice and burn incense, whic…