1 Corinthians 5:6
"Your glorying is not good. Know ye not that a little leaven leaveneth the whole lump?"
Cross References (ranked by relevance)
A little leaven leaveneth the whole lump.
Be not deceived: evil communications corrupt good manners.
But now ye rejoice in your boastings: all such rejoicing is evil.
And ye are puffed up, and have not rather mourned, that he that hath done this deed might be taken away from among you.
Therefore let no man glory in men. For all things are yours;
It is like leaven, which a woman took and hid in three measures of meal, till the whole was leavened.
Another parable spake he unto them; The kingdom of heaven is like unto leaven, which a woman took, and hid in three measures of meal, till the whole was leavened.
And their word will eat as doth a canker: of whom is Hymenaeus and Philetus;