'Unleavened Bread' in the Bible

And on the first of the days of unleavened bread the disciples came to Jesus, saying, Where wilt thou that we make ready for thee to eat the passover?

And two days after was the passover, and the feast of unleavened bread; and the chief priests and the scribes sought how they might seize him by craft, and put him to death.

And on the first day of the feast of unleavened bread, when they used to kill the passover, his disciples say to him, Where wilt thou that we go and make ready for thee to eat the passover?

Now the feast of unleavened bread, which is called the passover, was drawing near;

Then came the day of unleavened bread, when the passover must be killed;

And seeing that it pleased the Jews, he proceeded to apprehend Peter also; (then were the days of unleavened bread;)

But we set sail from Philippi, after the days of unleavened bread, and came to them at Troas in five days, where we abode seven days.

So then let us keep the feast, not with the old leaven, nor with the leaven of malice and wickedness, but with the unleavened bread of sincerity and truth.