Matthew 13:33

Another figure which he used with them was this: "The Kingdom of Heaven is like yeast, which a woman took and buried in a bushel of flour until it had all risen."

1 Timothy 4:4

For everything God has created is good, and nothing need be refused, provided it is accepted with thanksgiving,

Treasury of Scripture Knowledge

Summary

Besides the cakes, he shall offer for his offering leavened bread with the sacrifice of thanksgiving of his peace offerings.

Bible References

Leavened

Matthew 13:33
Another figure which he used with them was this: "The Kingdom of Heaven is like yeast, which a woman took and buried in a bushel of flour until it had all risen."
1 Timothy 4:4
For everything God has created is good, and nothing need be refused, provided it is accepted with thanksgiving,