The meat of the fellowship offering must be eaten on the same day it is offered as a way of showing thanks to God. None of the meat should remain until the next morning.
“When you kill an animal and offer its blood as a sacrifice, you must not include anything that has yeast in it. And when you burn the fat from my sacrifice, don’t let any of it remain until morning.
People can bring fellowship offerings to show their thanks to God. If you bring your sacrifice to give thanks, you should also bring unleavened bread mixed with oil, wafers with oil poured over them, and loaves of fine flour mixed with oil.