waited on their # 13_1CH_06_32 # And they ministered before the dwelling place of the tabernacle of the congregation with singing, until Solomon had built the house of the LORD in Jerusalem: and [then] they waited on their office according to their order. 
waited on their # 14_2CH_07_06 # And the priests waited on their offices: the Levites also with instruments of music of the LORD, which David the king had made to praise the LORD, because his mercy [endureth] for ever, when David praised by their ministry; and the priests sounded trumpets before them, and all Israel stood.