Luke 2:48-50 King James Version (KJV)
48 And when they saw him, they were amazed: and his mother said unto him, Son, why hast thou thus dealt with us? behold, thy father and I have sought thee sorrowing.
49 And he said unto them, How is it that ye sought me? wist ye not that I must be about my Father's business?
50 And they understood not the saying which he spake unto them.
The interpretation of the saying is below:
Luke 19:10 King James Version (KJV)
10 For the Son of man is come to seek and to save that which was lost.
The father's business is that his son, look for and save that which is lost.
48 And when they saw him, they were amazed: and his mother said unto him, Son, why hast thou thus dealt with us? behold, thy father and I have sought thee sorrowing.
49 And he said unto them, How is it that ye sought me? wist ye not that I must be about my Father's business?
50 And they understood not the saying which he spake unto them.
The interpretation of the saying is below:
Luke 19:10 King James Version (KJV)
10 For the Son of man is come to seek and to save that which was lost.
The father's business is that his son, look for and save that which is lost.