the Targum, and so Kimchi, that these not only sung the praises of God morning and evening, but at all times when burnt offerings were offered to the Lord; besides, some of them helped the priests at such times in slaying the sacrifices, and bringing them to the altar: and especially their service was requisite in the sabbaths, in the new moons, and on the set feasts, by number; because, besides the daily sacrifices, there were additional offerings at those times: according to the order commanded unto them continually before the Lord; see Num 28:1 .