Leviticus 7:13
With cakes of leavened bread he shall offer his offering in the sacrifice of thanksgiving of his peace.
Amos 4:5
and offer a sacrifice of praise with leaven, and proclaim and publish the free will offerings for this is the way you like it, O ye sons of Israel, said the Lord GOD.
Leviticus 23:17
Ye shall bring out of your habitations two wave loaves of two-tenth deals; they shall be of fine flour, they shall be baked with leaven, they are the firstfruits unto the LORD.
Matthew 13:33
He spoke another parable unto them: The kingdom of the heavens is like unto leaven, which a woman took and hid in three measures of meal until the whole was leavened.
1 Timothy 4:4
For everything that God created is good, and nothing is to be refused, if it is received with thanksgiving,