Matthew 16:12
Then they understood that He did not say to beware of the leaven of the (bread) of the Pharisees and Sadducees, but of the teaching of the Pharisees and Sadducees.
Matthew 26:26
And they eating, Jesus taking the bread, and blessing it, broke, and gave it to the disciples, and said, Take, eat; this is my body.
John 6:52-57
Then the Jews were contending with one another, saying, How is this One able to give unto us His flesh to eat?
1 Corinthians 5:6-8
Your boasting is not good. Do you not know that a little leaven leavens the whole lump?
Galatians 5:9
A little leaven leavens the whole lump.
1 Thessalonians 1:6
And you became imitators of us, and the Lord, having received the word in much tribulation, with the joy of the Holy Ghost;