Luke 2:43
And when the days of the feast came to an end and they were going back, the boy Jesus was still in Jerusalem, but they had no knowledge of it:
Exodus 12:15
For seven days let your food be unleavened bread; from the first day no leaven is to be seen in your houses: whoever takes bread with leaven in it, from the first till the seventh day, will be cut off from Israel.
2 Chronicles 25:17
Then Amaziah, king of Judah, acting on the suggestion of his servants, sent to Joash, the son of Jehoahaz, the son of Jehu, king of Israel, saying, Come, let us have a meeting face to face.
2 Chronicles 30:21-23
So the children of Israel who were present in Jerusalem kept the feast of unleavened bread for seven days with great joy: and the Levites and the priests gave praise to the Lord day by day, making melody to the Lord with loud instruments.