Luke 2:49 in the King James Version
And he said unto them, How is it that ye sought me? wist ye not that I must be about my Father’s business?
Context
48 When they saw him, they were astonished; and his mother said to him, “Son, why have you treated us this way? Behold, your father and I were anxiously looking for you.”
49 He said to them, “Why were you looking for me? Didn’t you know that I must be in my Father’s house?”
50 They didn’t understand the saying which he spoke to them.