TSK
Treasury of Scripture Knowledge references in KJV.
Seven days shall ye eat unleavened bread; even the first day ye shall put away leaven out of your houses: for whosoever eateth leavened bread from the first day until the seventh day, that soul shall be cut off from Israel.
Then understood they how that he bade [them] not beware of the leaven of bread, but of the doctrine of the Pharisees and of the Sadducees.
¶ In the mean time, when there were gathered together an innumerable multitude of people, insomuch that they trode one upon another, he began to say unto his disciples first of all, ‹Beware ye of the leaven of the Pharisees, which is hypocrisy.›
Therefore said the disciples one to another, Hath any man brought him [ought] to eat?
A little leaven leaveneth the whole lump.