Coffman Commentaries on the Bible - Luke 2:42
And when he was twelve years old, they went up after the custom of the feast; and when they had fulfilled the days, as they were returning, the boy Jesus tarried behind in Jerusalem; and his parents knew it not.All Jewish adult males were required to attend the passover; and it was usually observed by the entire families of all the people who were physically able to make the journey. There is nothing here of the Bar-Mitzvah service for Jewish boys entering their thirteenth year, although the... read more
E.W. Bullinger's Companion Bible Notes - Luke 2:42
twelve years old : when every Jewish boy becomes "a son of the law "If they performed "all things" according to the Law, Joseph had paid the five shekels redemption money (Numbers 3:47 ; Numbers 3:18 , Numbers 3:16 ), which gave Joseph the legal right to be reckoned the "father", claiming the obedience shown in Luke 2:51 . See notes on Luke 2:45 , and Luke 3:23 , which, thus explain the genealogy there. read more