فَإِنَّكَ لَا تُسْمِعُ الْمَوْتَىٰ وَلَا تُسْمِعُ الصُّمَّ الدُّعَاءَ إِذَا وَلَّوْا مُدْبِرِينَ (52)
(30:52) (O Prophet), you cannot make the dead hear, *76 nor can you make the deaf hear your call when they turn back in retreat, *77
*76) That is, those whose consciences have become dead, whose moral selves have become devoid of life, whose self-worship and stubbornness and obstinacy have destroyed their capacity to understand and accept the Truth.
*77) "The deaf" : those who have put locks on their minds and hearts so that they do not understand anything although they hear everything; then, when such people also try that the message of the Truth should not at all eater their ears, and they should avoid and keep away from the inviter, nobody can make them hear and understand anything.