Leviticus 22:27

“And you shall do the same with your oxen and with your sheep. It shall be with its mother seven days; on the eighth day you shall give it to Me.

“It shall be on Aaron’s forehead, and Aaron shall take away the iniquity of the holy things which the sons of Israel set apart as holy, with regard to all their holy gifts; and it shall continually be on his forehead, that they may be accepted before Yahweh.

And Samuel took a suckling lamb and offered it for a whole burnt offering to Yahweh; and Samuel cried out to Yahweh for Israel, and Yahweh answered him.