Leviticus 1:16

And he shall pluck away his crop with his feathers, and cast it beside the altar on the east part, by the place of the ashes:

Cross-reference

Leviticus 6:10 describes the priest taking ashes from the altar and placing them beside it, the same area where the crop is cast in verse 16.

Leviticus 4:12 also mentions the place of ashes, where the sin offering bull is burned, showing a shared disposal location for different offerings.

Leviticus 6:11 continues the ash disposal process by taking them outside the camp, extending the location mentioned in verse 16.