يَا أَيُّهَا النَّاسُ اتَّقُوا رَبَّكُمُ الَّذِي خَلَقَكُم مِّن نَّفْسٍ وَاحِدَةٍ وَخَلَقَ مِنْهَا زَوْجَهَا وَبَثَّ مِنْهُمَا رِجَالًا كَثِيرًا وَنِسَاءً ...

All human beings are one and the same by birth. Ultimately, everyone can trace his origin to the same man and woman as father and mother. It is, therefore, necessary that all human beings should have a feeling of affinity with each other and live with fairness and goodwill like the members of one extended family. This racial unity becomes more compact in family relationships and the importance of decent behaviour among kinsfolk becomes further heightened. Good behaviour between fellow human beings is important, not merely from the moral point of view, but rather as a matter of personal concern to man himself. This is so, because everyone is governed by the Great, Almighty God, who as the Reckoner for one and all, will decide the eternal future of all human beings in the Hereafter, requiting them according to their actions in this world. Man should, therefore, not consider his dealings with others as a matter between man and man, but as a matter between man and God. He should fear the grip of God and should adhere to the bounds set by God so as to save himself from His wrath. According to a hadith, God proclaimed, ‘I shall associate Myself with one who strengthens the ties of kinship and detach Myself from one who severs them.’ This shows that man’s attachment to God is being tested by the criterion of his relations with other human beings. One who goes in fear of God while dealing with the rights of others, is one who truly venerates Him; one who loves other human beings, is one who really loves his Creator. The virtues of fair dealing and compassion are general requirements of human society, but so vital are they to maintaining good family relations that in importance they stand second only to God.

— Source: Tazkirul Quran (Maulana Wahiduddin Khan) via Quran.com (4:1)