The chin and the jawbones: what is due for them?

Ibn Jurayj said: Abdul Aziz bin Umar told me that the commanders of the armies agreed, in the time of Umar bin Abdul Aziz, that for the chin there is one third of the blood money.

Ibn Jurayj said: It reached me from al-Sha'bi that he said that when the jawbone is broken, there are forty dinars for it.

Ibn Jurayj said: It was related to me from Sa'id bin al-Musayyib that he said, regarding the two jaws of a person, that the blood money for broken jaws will be estimated with the thumb, in this way: his thumb is bent, then its lower segment is placed, and he opens his mouth and places them between his two jawbones; then whatever the opening of his mouth falls short of the lower segment of his thumb, the blood money will be in proportion to it.