If any of the flesh for the ordination or of the bread remains until the morning, then you shall burn the remainder with fire; it shall not be eaten, because it is holy.
“No grain offering that you bring to the Lord shall be made with leaven, for you must not turn any leaven or honey into smoke as an offering by fire to the Lord.
He told them another parable: “The kingdom of heaven is like yeast that a woman took and mixed in with three measures of flour until all of it was leavened.”
You must not eat with it anything leavened. For seven days you shall eat unleavened bread with it—the bread of affliction—because you came out of the land of Egypt in great haste, so that all the days of your life you may remember the day of your departure from the land of Egypt.
No leaven shall be seen with you in all your territory for seven days, and none of the meat of what you slaughter on the evening of the first day shall remain until morning.