What is the prescribed compensation for injury to the radius and ulna (az-zandayn)?
Chapter on Diyat (Blood Money) for Wounds
Al-Mughni
Book of Blood-Money (Diyyāt)
Primary text
The compensation for injury to the two forearm bones (az-zandayn) is four camels, meaning one camel for each of the four bones involved. This ruling is narrated from 'Umar ibn Al-Khattab. The evidence for this is the narration that 'Amr ibn Al-'As inquired of 'Umar regarding a broken forearm bone, and 'Umar replied that the compensation is two camels for one forearm bone, and four camels if both are broken. This transmission lacks known opposition among the Companions, thereby constituting consensus (ijma').
Supporting text
Abu Hanifa, Malik, and Al-Shafi'i rule that the compensation is determined by discretionary judgment (hukuma) based on the reasoning previously stated regarding internal bones.