'Thanksgiving' in the Bible

If he offers it for a thanksgiving, then he shall offer with the sacrifice of thanksgiving unleavened cakes mixed with oil, and unleavened wafers anointed with oil, and cakes mixed with oil.

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

The flesh of the sacrifice of his peace offerings for thanksgiving shall be eaten on the day of his offering. He shall not leave any of it until the morning.

"When you sacrifice a sacrifice of thanksgiving to Yahweh, you shall sacrifice it so that you may be accepted.