For seven days there must not be any yeast in your houses. Anybody who eats yeast during this time, either an Israelite or non-Israelite, must be cut off from the community of Israel.
“Do not offer the blood of a sacrifice to me with anything containing yeast, and do not leave any of the sacrifice of the Feast of Passover until the next morning.
Then Jesus told another story: “The kingdom of heaven is like yeast that a woman took and hid in a large tub of flour until it made all the dough rise.”