Leviticus 7:13

and he shall bring his offering upon cakes made of leavened bread unto the thank offering of his peace offerings,

Amos 4:5

Ye made a thank offering of leaven, ye promised free will offerings, and proclaimed them. Such lust had ye, O ye children of Israel,' sayeth the LORD God.

Leviticus 23:17

And ye shall bring out of your habitations two wave loaves made of two tenth deals of fine flour, leavened and baken, for first fruits unto the LORD.

Matthew 13:33

Another similitude said he to them, "The kingdom of heaven is like unto leaven which a woman taketh and hideth in three pecks of meal, till all be leavened."

1 Timothy 4:4

For all the creatures of God are good: and nothing to be refused, if it be received 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.

General references

Bible References

Leavened

Leviticus 23:17
And ye shall bring out of your habitations two wave loaves made of two tenth deals of fine flour, leavened and baken, for first fruits unto the LORD.
Amos 4:5
Ye made a thank offering of leaven, ye promised free will offerings, and proclaimed them. Such lust had ye, O ye children of Israel,' sayeth the LORD God.
Matthew 13:33
Another similitude said he to them, "The kingdom of heaven is like unto leaven which a woman taketh and hideth in three pecks of meal, till all be leavened."
1 Timothy 4:4
For all the creatures of God are good: and nothing to be refused, if it be received with thanksgiving:

General references

Leviticus 22:29
When ye will offer a thank offering unto the LORD, ye shall so offer it that ye may be accepted.
Numbers 7:23
And this was the offering of Nethanel the son of Zuar.