Leavened bread — Because this was a sacrifice of another kind than those in which leaven was forbidden, this being a sacrifice of thanksgiving for God's blessings, among which leavened bread was one. Leaven indeed was universally forbidden, Leviticus 2:11. But that prohibition concerned only things offered and burnt upon the altar, which this bread was not.
Related Commentaries of Leviticus 7:13
Leviticus 7:13
13 Besides the cakes, he shall offer for his offering leavened bread with the sacrifice of thanksgiving of his peace offerings.