In episode #43, Evan and Malcolm reason over Luke 2 where God and His messengers find witnesses to the birth of Jesus. 

'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. And he said unto them, How is it that ye sought me? wist ye not that I must be about my Father's business? '  Luke 2:48-49 https://my.bible.com/bible/1/LUK.2.48-49