13 The sons of Amʹram were Aaron+ and Moses.+ But Aaron was permanently set apart+ to sanctify the Most Holy, he and his sons, to offer sacrifices before Jehovah, to minister to him, and to pronounce blessings in his name always.+

27 For according to the last instructions of David, the Levites from 20 years old and up were numbered. 28 Their function was to assist the sons of Aaron+ for the service of the house of Jehovah, to be in charge of the courtyards,+ the dining rooms, the purification of every holy thing, and any work needed for the service of the house of the true God. 29 They assisted with the layer bread,*+ the fine flour for the grain offering, the wafers of unleavened bread,+ the griddle cakes, the mixed dough,+ and all measures of quantity and size. 30 They were to stand morning by morning+ to thank and praise Jehovah and likewise in the evening.+