Musannaf Ibn Abi Shaybah

Hazrat Mujahid said that if the backbone is broken and then joins again, and his semen is cut off (i.e., there is such a loss that his lineage cannot continue), then his compensation will be full blood money. And if the semen is not cut off and there is some crookedness in his back, then it will be considered (i.e., the compensation will be according to the extent of the loss).