Leviticus 7:13

With cakes of leavened bread he shall offer his oblation with the sacrifice of his peace-offerings for thanksgiving.

Amos 4:5

and offer a sacrifice of thanksgiving of that which is leavened, and proclaim freewill-offerings and publish them: for this pleaseth you, O ye children of Israel, saith the Lord Jehovah.

Leviticus 23:17

Ye shall bring out of your habitations two wave-loaves of two tenth parts of an ephah : they shall be of fine flour, they shall be baken with leaven, for first-fruits unto Jehovah.

Matthew 13:33

Another parable spake he unto them; The kingdom of heaven is like unto leaven, which a woman took, and hid in three measures of meal, till it was all leavened.

1 Timothy 4:4

For every creature of God is good, and nothing is to be rejected, 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
Ye shall bring out of your habitations two wave-loaves of two tenth parts of an ephah : they shall be of fine flour, they shall be baken with leaven, for first-fruits unto Jehovah.
Amos 4:5
and offer a sacrifice of thanksgiving of that which is leavened, and proclaim freewill-offerings and publish them: for this pleaseth you, O ye children of Israel, saith the Lord Jehovah.
Matthew 13:33
Another parable spake he unto them; The kingdom of heaven is like unto leaven, which a woman took, and hid in three measures of meal, till it was all leavened.
1 Timothy 4:4
For every creature of God is good, and nothing is to be rejected, if it be received with thanksgiving:

General references

Leviticus 22:29
And when ye sacrifice a sacrifice of thanksgiving unto Jehovah, ye shall sacrifice it that ye may be accepted.
Numbers 7:23
and for the sacrifice of peace-offerings, two oxen, five rams, five he-goats, five he-lambs a year old: this was the oblation of Nethanel the son of Zuar.

American Standard Version Public Domain