Matthew 16:12
Then they understood, that he did not bid them beware of the leaven of bread, but of the doctrine of the Pharisees and Saducees.
Matthew 26:26
And after they had eaten, Jesus took bread and blessed and brake and gave it to his disciples and said, Take, eat; this is my body.
John 6:52-57
The Jews then debated among themselves, saying, How can this man give us his flesh to eat?
1 Corinthians 5:6-8
Your glorying is not good: know ye not, that a little leaven leaveneth the whole lump?
Galatians 5:9
A little leaven leaveneth the whole lump.
1 Thessalonians 1:6
And ye became imitators of us and of the Lord, having received the word in much affliction, with joy of the Holy Ghost.