'Yeast' in the Bible

Another parable He spoke to them. "The Kingdom of the Heavens," He said, "is like yeast which a woman takes and buries in a bushel of flour, for it to work there till the whole mass has risen."

and when Jesus said to them, "See to it: beware of the yeast of the Pharisees and Sadducees,"

How is it you do not understand that it was not about bread that I spoke to you? But beware of the yeast of the Pharisees and Sadducees."

and when He admonished them, "See to it, be on your guard against the yeast of the Pharisees and the yeast of Herod,"

Meanwhile the people had come streaming towards Him by tens of thousands, so that they were trampling one another under foot. And now He proceeded to say to His disciples first, "Beware of the yeast of the Pharisees, that is to say, beware of hypocrisy.

It is like yeast which a woman takes and buries in a bushel of flour, to work there till the whole is leavened."

It is no good thing--this which you make the ground of your boasting. Do you not know that a little yeast corrupts the whole of the dough?

Get rid of the old yeast so that you may be dough of a new kind; for in fact you *are* free from corruption. For our Passover Lamb has already been offered in sacrifice--even Christ.

Therefore let us keep our festival not with old yeast nor with the yeast of what is evil and mischievous, but with bread free from yeast--the bread of transparent sincerity and of truth.

A little yeast corrupts the whole of the dough.