His statement, “Then the bāḍiʿah, which cuts into the flesh”: that is, it has gone beyond the skin into the flesh and cut it open.
His statement, “Then the mutalāḥimah, which penetrates deeply into the flesh”: it is so called because it sinks into the flesh, as though it has become part of it.
His statement, “Then the simḥāq, in which only a thin membrane remains between it and the bone”: simḥāq originally refers to the membrane between the flesh and the bone—the white membrane. The head wound was thus named after this membrane because it reaches it.
In determining these head wounds, the opinion of experts is consulted. The experts have a probe, an instrument with which they measure the extent of the wound and ascertain it precisely.
His statement, “For these five, there is no fixed compensation; rather, compensation is assessed by judicial evaluation”: that is, there is no specified portion of the blood-money due for them; rather, their compensation is assessed by judicial evaluation. Thus, if the injured person claims blood-money, he is entitled only to an assessed compensation.
Such an assessment is made by valuing the injured person as though he were a slave with no injury, then valuing him as though he were a slave after recovering from the injury. The difference between the two values is due to him in the same proportion of the full blood-money.
For example, if his value, were he a slave with no injury, were estimated at ten thousand riyals, but after the injury has healed he were worth nine thousand five hundred, then his blood-money would be one-twentieth—that is, five camels. Accordingly, the compensation for the injury would be five camels.