Leviticus 6:10

And the priest shall put on his linen garment, Exodus 28:40, and his linen breeches shall be put upon his flesh, and take up the ashes which the fire hath consumed with the burnt offering on the altar; the sacrifices having been turned to ashes in the burning, the officiating priest was to remove all these ashes; and he shall put them beside the altar, a special place being provided for that purpose on the east side of the court.