Matthew 16:12
then they perceived, he did not caution them against the leaven of bread, but against the Pharisaick and Sadducean doctrine.
Matthew 26:26
While they were yet eating, Jesus took bread, and having given thanks, he brake it, and gave it to the disciples, saying, take, eat; this represents my body.
John 6:52-57
Upon this the Jews disputed among themselves, saying, how can this man give us his flesh to eat?
1 Corinthians 5:6-8
Your levity is very indecent: don't you know that a little leaven infects the whole mass?
Galatians 5:9
a little leaven affects the whole mass.
1 Thessalonians 1:6
and you imitated us, and were imitators of the Lord, having receiv'd the word, notwithstanding all your afflictions, with that alacrity, which the holy spirit inspires.