“Besides the cakes, he shall offer for his offering leavened bread with the sacrifice of thanksgiving of his peace offerings.”
King James Version (KJV)
7:13 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, #Lev 2:11|. But that prohibition concerned only things offered and burnt upon the altar, which this bread was not.