Luke 2:43

After those days were over, as they were returning, the boy Jesus stayed behind in Jerusalem, but His parents did not know it.

Exodus 12:15

You must eat unleavened bread for seven days. On the first day you must remove yeast from your houses. Whoever eats what is leavened from the first day through the seventh day must be cut off from Israel.

2 Chronicles 25:17

King Amaziah of Judah took counsel and sent word to Jehoash son of Jehoahaz, son of Jehu, king of Israel, saying, “Come, let us meet face to face.”

2 Chronicles 30:21-23

The Israelites who were present in Jerusalem observed the Festival of Unleavened Bread seven days with great joy, and the Levites and the priests praised the Lord day after day with loud instruments.

Treasury of Scripture Knowledge

Summary

And when they had fulfilled the days, as they returned, the child Jesus tarried behind in Jerusalem; and Joseph and his mother knew not of it.

Bible References

General references

2 Chronicles 30:21
The Israelites who were present in Jerusalem observed the Festival of Unleavened Bread seven days with great joy, and the Levites and the priests praised the Lord day after day with loud instruments.
2 Chronicles 25:17
King Amaziah of Judah took counsel and sent word to Jehoash son of Jehoahaz, son of Jehu, king of Israel, saying, “Come, let us meet face to face.”

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.