And the singers the sons of Asaph [were] in their place, according to the commandment of David, and Asaph, and Heman, and Jeduthun the king's (h) seer; and the porters [waited] at every gate; they might not depart from their service; for their brethren the Levites prepared for them.
(h) Meaning, by this his prophet, because he appointed the psalms and prophecies which were to be sung.