aa02d788_ipped_From_The_Bible_Chapter_1__New_International_Version
[King James Bible] LUK 2:43 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. [New International Version] 
After the Feast was over, while his parents were returning home, the boy Jesus stayed behind in Jerusalem, but they were unaware of it.
Ripped From The Bible-Chapter 1
New International Version