Leviticus 5:8

5:8 He must bring them to the priest and present first the one that is for a sin offering. The priest must pinch its head at the nape of its neck, but must not sever the head from the body.

Leviticus 1:17

1:17 and tear it open by its wings without dividing it into two parts. Finally, the priest must offer it up in smoke on the altar on the wood which is in the fire – it is a burnt offering, a gift of a soothing aroma to the Lord.