'Unleavened Bread' in the Bible

And because he saw it pleased the Jews, he proceeded further to take Peter also. (Then were the days of unleavened bread.)

(Then were the days of unleavened bread.) Whom having apprehended, he put in prison, delivering him to four quaternions of soldiers to keep him, intending to bring him forth to the people after the passover.

These going before, staid for us at Troas, And we set sail from Philippi after the days of unleavened bread,

And we sailed away from Philippi after the days of unleavened bread, and came unto them to Troas in five days; where we abode seven days.