[35].Surah Fatir [The Originator of Creation]: Ayat 39

৩৯. তিনিই তোমাদেরকে পৃথিবীতে স্বীয় প্রতিনিধি করেছেন। অতএব যে কুফরী করবে তার কুফরী তার উপরই বর্তাবে। কাফেরদের কুফর কেবল তাদের পালনকর্তার ক্রোধই বৃদ্ধি করে এবং কাফেরদের কুফর কেবল তাদের ক্ষতিই বৃদ্ধি করে।

Ayat 39. He (Allah) it is Who has made you successors generations after generations in the earth, so whosoever disbelieves (in Islamic Monotheism) on him will be his disbelief. And the disbelief of the disbelievers adds nothing but hatred with their Lord. And the disbelief of the disbelievers adds nothing but loss.

Tafseer of Surah Fatir Ayat 39. He it is That has made you inheritors in the earth:  if, then, any do reject (Allah), their rejection (works) against themselves: their rejection but adds to the odium for the Unbelievers in the sight of their Lord: their rejection but adds to (their own) undoing. Inheritors: khala'if. In two senses: (1) as Vicegerents of Allah on earth, and (2) as successors to previous, people who forfeited their rights by wrongdoing. The honour and dignity of (1) and the examples of the past in (2) should have kept them straight and made them truly grateful. See also 6:165. Their rejection and ingratitude only causes injury to themselves. They lose all honour and incur odium in the sight of Allah, and they complete their own undoing.

Hazrat Saeed Al-Khudri (May Allah be pleased with him) reported: The Messenger of Allah  [SAWW](PBUH) said, "Whoever amongst you sees an evil, he must change it with his hand; if he is unable to do so, then with his tongue; and if he is unable to do so, then with his heart; and that is the weakest form of Faith". [Muslim Book 01, Chapter 21, Hadith # 80]

Lesson: as mentioned above in Surah Fatir Ayat 39. He (Allah) it is Who has made you successors generations after generations in the earth, so whosoever disbelieves (in Islamic Monotheism) on him will be his disbelief. This Hadith contains a very important prescription to prevent the Muslim society from all things which are forbidden in Islam. So long as Muslims adhered to it and ceaselessly and fearlessly performed their obligation of enjoining the right and forbidding the wrong, their society was largely safe from many evils and sins.