The life of human beings is established in this material...
The life of human beings is established in this material world on the basis of cooperation. All those in this world, who possess intellect, seek mutual assistance in their worldly affairs. This matter is so obvious that nobody has ever found fault with it and because our discussion is based on Qur’an and traditions, we shall restrain ourselves at this point by quoting a verse.
(Kahf 18:95)” Second Case Requesting someone to pray for good or seeking forgiveness from living persons in this material world; the correctness and firmness of such a request from the living is from the necessities related to the Holy Qur’an. Anyone having a little acquaintance with the Holy Qur’an is aware that the ways of the Prophets was to seek forgiveness for their ummah (nation) and or the ummah themselves were placing such a request before the Prophets.
(Tauba 9:103)” In this verse, Allah directly commands the Holy Prophet (s) to pray for them and the effect of his prayers is so quick that one feels comfort in one's heart after the prayers of the Holy Prophet (s). (2) Sometimes, the Prophets themselves used to promise the sinners that they would seek forgiveness for them under special circumstances.