33 These were the singers, the heads of the paternal houses of the Levites in the chambers,* those set free from other duties; for by day and by night it was their responsibility to be on duty.

27 For according to the last instructions of David, the Levites from 20 years old and up were numbered.

30 They were to stand morning by morning+ to thank and praise Jehovah and likewise in the evening.+