Numbers 15:3

‘Its entrails, however, and its legs he shall wash with water. And the priest shall offer up in smoke all of it on the altar for a burnt offering, an offering by fire of a soothing aroma to Yahweh.

‘And when a man brings a sacrifice of peace offerings near to Yahweh to fulfill a special vow or for a freewill offering, of the herd or of the flock, it must be without blemish to be accepted; there shall be no defect in it.

and a basket of unleavened cakes of fine flour mixed with oil and unleavened wafers spread with oil, along with their grain offering and their drink offering.

With a freewill offering I will sacrifice to You; I will give thanks to Your name, O Yahweh, for it is good.