And David will go even to Ornan, and Ornan will look and see David, and he will go forth from the threshing-floor, and he will worship to David, the face to the earth.

Ascribe to Yahweh the glory of His name;
bring an offering and come before Him.
Worship the Lord in the splendor of His holiness;

4,000 are to be gatekeepers, and 4,000 are to praise the Lord with the instruments that I have made for worship.”

Zadok the priest and his fellow priests served before the Lord's tabernacle at the worship center in Gibeon,

Now the Lord's tabernacle (which Moses had made in the wilderness) and the altar for burnt sacrifices were at that time at the worship center in Gibeon.

Some of them were in charge of the utensils used in worship. They would count them when they brought them in and when they took them out.