15-3 Ja’far ibn Ali ibn al-Hassan ibn Ali ibn Abdullah ibn al-Muqayrih al-Kufy - may God be pleased with him - narrated that his father Ali ibn al-Hassan quoted his father Al-Hassan ibn Ali ibn Abdullah ibn al-Muqayrih al-Kufy, on the authority of Al-Ab’bas ibn Amer al-Qasbani, on the authority of someone who quoted Aba Abdullah as-Sadiq (MGB), “A child should be instructed to fast when he is fifteen or sixteen years old.”