Exodus 29:9

Thou shalt consecrate Aaron and his sons— The Hebrew, shalt fill the hand of, &c. The same expression is used in the 41st verse of the foregoing chapter; and it seems to be taken from putting certain parts of the sacrifices into the hands of the priests at their consecration: thus giving and confirming to them the right of offering to God gifts and sacrifices. See Hebrews 5:1; Hebrews 8:3. The expression is applied to superstitious consecrations also; no doubt, because the same ceremony was observed in them. 1 Kings 13:33. 2 Chronicles 13:9.