Matt 13:33 Another parable spake he unto them; The kingdom of heaven is like unto leaven, which a woman took, and hid in three measures of meal, till the whole was leavened.
Luke 13:21 It is like leaven, which a woman took and hid in three measures of meal, till the whole was leavened.
1 Cor 5:6 Your glorying is not good. Know ye not that a little leaven leaveneth the whole lump?