Leaven in a dream

Biblical meaning from Hearing God's Voice in Dreams by Apostle Nicholas V. Mbanjwa

Also: Yeast, Old leaven, Leavened bread

What it means

Sin, and the nature of fallen man.

Pride and puffing up — a little leaven leavens the whole lump.

Leaven works invisibly and spreads through everything it touches, which is why it pictures corruption that is not noticed until it has affected the whole.

✦ When it is positive

Leaven as the Kingdom of Heaven hidden in three measures of meal, representing quiet and pervasive Kingdom growth

⚠ When it is a warning

Sin and corruption spreading unnoticed
The fallen nature
The doctrine or hypocrisy of religious leaders

How to tell the difference

Leaven is almost always negative in Scripture, with one clear exception in the parable of the Kingdom. Read it positively only where the dream's tone and the object being leavened plainly point to growth rather than corruption. Note WHOSE leaven it is — Christ named the leaven of the Pharisees and of Herod specifically.

Scripture

They shall eat the meat in that night, roasted with fire, with unleavened bread. They shall eat it with bitter herbs.
Exodus 12:8 (WEB)

He spoke another parable to them. “The Kingdom of Heaven is like yeast which a woman took and hid in three measures of meal, until it was all leavened.”
Matthew 13:33 (WEB)

⁶Jesus said to them, “Take heed and beware of the yeast of the Pharisees and Sadducees.” ⁷They reasoned among themselves, saying, “We brought no bread.” ⁸Jesus, perceiving it, said, “Why do you reason among yourselves, you of little faith, because you have brought no bread? ⁹Don’t you yet perceive or remember the five loaves for the five thousand, and how many baskets you took up,
Matthew 16:6-12 (WEB)

⁶Your boasting is not good. Don’t you know that a little yeast leavens the whole lump? ⁷Purge out the old yeast, that you may be a new lump, even as you are unleavened. For indeed Christ, our Passover, has been sacrificed in our place. ⁸Therefore let’s keep the feast, not with old yeast, neither with the yeast of malice and wickedness, but with the unleavened bread of sincerity and truth.
1 Corinthians 5:6-8 (WEB)

A little yeast grows through the whole lump.
Galatians 5:9 (WEB)