All are obligated to appear [at the Temple], except a deaf person, an imbecile and a minor, a person of unknown sex [tumtum], a hermaphrodite, women, unfreed slaves, a lame person, a blind person, a sick person, an aged person, and one who is unable to go up on foot. Who is a minor? Whoever is unable to ride on his father’s shoulders and go up from Jerusalem to the Temple Mount, the words of Bet Shammai. But Bet Hillel say: whoever is unable to hold his father’s hand and go up from Jerusalem to the Temple Mount, as it is said: “Three regalim” (Exodus 23:14).