Belief in Munkar and Nakir's questioning in the grave generated concrete funerary customs across much of the Muslim world, intended to help or comfort the deceased through the barzakh's opening ordeal.
Talqin, instruction or reminding, is the practice, more common historically and still observed in some Sunni communities and widely among Shia Muslims, of a person present at the burial addressing the deceased after interment, reciting the profession of faith and reminding them of the correct answers to the questions the angels will ask, on the premise that the deceased retains some form of awareness capable of being reminded. The practice has drawn scholarly disagreement: some jurists regard it as well-attested and beneficial, while others, particularly in Salafi-oriented scholarship, consider the graveside formula weakly attested and prefer confining comparable acts to supplication for the deceased.
Recitation of the Qur'an, particularly Surat Ya-Sin, at the graveside or dedicated to the deceased's benefit afterward, is a broadly attested and much less disputed practice, resting on general hadith encouraging recitation for the deceased and on the wider principle that the living can transmit spiritual benefit to the dead through charity, supplication and recitation performed on their behalf, connected to disputes elsewhere in Islamic theology over the extent to which the dead can be reached by the actions of the living, a question that, like barzakh itself, receives more elaboration from later jurisprudence and popular practice than from the Qur'an's own comparatively spare eschatological statements.