After Amaziah king of Judah consulted his advisers, he sent this challenge to Jehoash son of Jehoahaz, the son of Jehu, king of Israel: “Come, let us face each other in battle.”
For seven days you are to eat bread made without yeast. On the first day remove the yeast from your houses, for whoever eats anything with yeast in it from the first day through the seventh must be cut off from Israel.