1 Chronicles 23:30-32

30and to stand every morning to thank and praise Jehovah, and likewise at even; 31and for all burnt-offerings offered up to Jehovah on the sabbaths, on the new moons, and on the set feasts, by number, according to the ordinance concerning them, continually, before Jehovah; 32and they kept the charge of the tent of meeting, and the charge of the sanctuary, and the charge of the sons of Aaron their brethren, in the service of the house of Jehovah.