Also of relevance is , with which St Francis of Assisi began his first Rule of 1221: "Then Jesus said to his disciples, “Whoever wants to be my disciple must deny themselves and take up their cross and follow me". St Francis also used to be led with a cord around his neck as a penitential exercise, the cord being a detail added to many depictions of the episode from two Old Testament passages. These are : "He was oppressed and afflicted, yet he did not open his mouth; he was led like a lamb to the slaughter, and as a sheep before its shearers is silent, so he did not open his mouth" and "I had been like a gentle lamb led to the slaughter...", both of which were very frequently cited by medieval commentaries. In medieval typology, Isaac carrying wood up the mountain for his sacrifice is the most common parallel for the episode, and often shown as a complementary scene; this scene is "Isaac Bearing the Faggots" (or "wood") in traditional art history terminology.