Parables of the Leavened

He spoke another parable to them, "The kingdom of heaven is like leaven, which a woman took and hid in three pecks of flour until it was all leavened."

The woman symbolizes the creator who created man and woman. She is the woman who gave birth to a son in Revelation 12. She is the bride. The three pecks of flour is about tribulation of man that is the 7 seals of Judgment, 7 trumpets, and 7 bowls. It is about the judgment of evil man (leaven) and purify him until there is no more evil in him (leavened)

Related verses…

'No grain offering, which you bring to the LORD, shall be made with leaven, for you shall not offer up in smoke any leaven or any honey as an offering by fire to the LORD. (Leviticus 2:11)

'Seven days you shall eat unleavened bread, but on the first day you shall remove leaven from your houses; for whoever eats anything leavened from the first day until the seventh day, that person shall be cut off from Israel. (Exodus 12:15)

Let us therefore celebrate the festival, not with the old leaven, the leaven of malice and evil, but with the unleavened bread of sincerity and truth. (1 Corinthians 5:8)

And He was giving orders to them, saying, "Watch out! Beware of the leaven of the Pharisees and the leaven of Herod." (Mark 8:15)

Then they understood that He did not say to beware of the leaven of bread, but of the teaching of the Pharisees and Sadducees. (Matthew 16:12)

They are all adulterers, like an oven heated by the baker who ceases to stir up the fire from the kneading of the dough until it is leavened. (Hosea 7:4)