Read Luke 2:43 Using Other Translations
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.
And when the feast was ended, as they were returning, the boy Jesus stayed behind in Jerusalem. His parents did not know it,
After the celebration was over, they started home to Nazareth, but Jesus stayed behind in Jerusalem. His parents didn’t miss him at first,