'Thanksgiving' in the Bible

If one offers it as a sacrificial meal of thanksgiving, then along with the sacrifice of thanksgiving he shall offer unleavened cakes mixed with oil, and unleavened wafers spread with oil, and cakes of fine flour mixed with oil.

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

‘The meat of the sacrifice of thanksgiving presented as a peace offering shall be eaten on the day that it is offered; none of it shall be left until morning.

When you sacrifice an offering of thanksgiving to the Lord, you shall sacrifice it so that you may be accepted.