Leviticus 1:16; Leviticus 6:10; Leviticus 10:12

Leviticus 1:16

16 'He shall also take away its crop with its feathers and cast it beside the altar eastward, to the place of the ashes.

Leviticus 6:10

10 'The priest is to put on his linen robe, and he shall put on undergarments next to his flesh; and he shall take up the ashes to which the fire reduces the burnt offering on the altar and place them beside the altar.

Leviticus 10:12

12 Then Moses spoke to Aaron, and to his surviving sons, Eleazar and Ithamar, "Take the grain offering that is left over from the LORD'S offerings by fire and eat it unleavened beside the altar, for it is most holy.