Worshipers would present the peace offering for three reasons:
as thanks to God,
as payment of a vow (Leviticus 7:16), or
as a voluntary gift (see 3:1–7).
A worshiper showed thanks by giving a grain offering with the peace offering (2:1–16). A grain offering included unleavened cakes, wafers, or fine flour cakes. They mixed all of them or spread olive oil on them. They set aside a portion to burn (2:9). The grain offering came with loaves of "leavened bread" (7:13).