Luke 13:21
It is like leaven that a woman took and mixed into three measures of flour, until all of it was leavened.”
What it says
Leaven is mixed into flour until the whole batch is leavened.
What it is doing
The kingdom spreads through the whole mass.
In context
20Again He asked, “To what can I compare the kingdom of God? 21It is like leaven that a woman took and mixed into three measures of flour, until all of it was leavened.”