Is it true that the sense of hearing is the first sense to develop in humans, as the fetus hears in the sixth month while in its mother's womb, and dies while hearing people but unable to move? And is it true that one should not cry over the deceased because it causes them pain, or that they might rejoice upon hearing us cry over them? And is it obligatory to wear black as a sign of mourning for the deceased, and what is the required duration for that?

Hearing is the most important sense, and it functions after birth; before birth, the organs are formed but do not function. The hearing of the dead is affirmed by hadiths, such as the hearing of the slain of Quraish to the Prophet's call, and the deceased hearing the footsteps of those accompanying his funeral. The weeping that harms the deceased is wailing loudly if the deceased himself commanded it; as for one who did not command it, there is no sin upon him. Wearing black for mourning has no basis except for the wife for three days, and mourning in general is the abstention from adornment, which is obligatory for the wife during the waiting period (four months and ten days, or upon delivery for a pregnant woman), and permissible for others besides the wife for three days.