Numbers 15:1-3

Now the LORD spoke to Moses, saying, “Speak to the sons of Israel and say to them, ‘When you enter the land where you are to live, which I am giving you, then make an offering by fire to the LORD, a burnt offering or a sacrifice to fulfill a special vow, or as a freewill offering or in your appointed times, to make a soothing aroma to the LORD, from the herd or from the flock.