Matthew 16:12
Then they realized that he had not told them to beware of the leaven, but of the teaching of the Pharisees and Sadducees.
Matthew 26:26
And as they were eating, Jesus took bread and, when he had blessed it, he broke it and gave to his disciples, saying, "Take, eat, this is my body."
John 6:52-57
Then the Jews began to dispute among themselves, saying, "How can this man give us his flesh to eat?"
1 Corinthians 5:6-8
Your glorying is not good. Do you not know that even a little leaven leavens all the lump?
Galatians 5:9
A little leaven is leavening the whole lump.
1 Thessalonians 1:6
Moreover, you began to follow the pattern I set you, and the Lord's also, receiving the word with joy in the Holy Spirit, although amid severe persecution.