Luke 2:44 in the King James Version
But they, supposing him to have been in the company, went a day’s journey; and they sought him among their kinsfolk and acquaintance.
Context
43 and when they had fulfilled the days, as they were returning, the boy Jesus stayed behind in Jerusalem. Joseph and his mother didn’t know it,
44 but supposing him to be in the company, they went a day’s journey; and they looked for him among their relatives and acquaintances.
45 When they didn’t find him, they returned to Jerusalem, looking for him.