Seven days leaven shall not be found in your houses; for all eating from the leavened, that soul shall be destroyed from the assembly of Israel, for the sojourner or for the native of the land.
And Moses will call for all the old men of Israel and he will say to them, Draw out and take to yourselves a sheep according to your tribes, and slaughter the passing over.
Another parable spake he to them; The kingdom of the heavens is like to leaven, which a woman having taken, hid in three measures of wheaten flour, till the whole was leavened.