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See surah {7}, note [67].
Thus, belief in the One God and justice in all dealings between man and man (see surah {6}, note [150]) are here placed together as the twin postulates of all righteousness. Some commentators assume that the people of Madyan were of a particularly commercial bent of mind, and given to fraudulent dealings. It is obvious, however, that the purport of this passage and of its sequence goes far beyond anything that might be construed by a purely "historical" interpretation. What this version of Shu'ayb's story aims at is - as always in the Qur'an - the enunciation of a generally applicable principle of ethics: namely, the impossibility of one's being righteous with regard to God unless one is righteous - in both the moral and social senses of this word - in the realm of human relationships as well. This explains the insistence with which the above prohibition is re-stated in a positive form, as an injunction, in the next verse.
Cf. vii. 85-93. The location of Madyan is explained in n. 1053 to vii. 85 and the chronological place of Shu'aib in n. 1064 to vii. 93. The point of the reference here is different from that in S. vii. Here the emphasis is on Allah's dealings with men and men's crooked and obstinate ways: there the emphasis was rather on their treatment of their Prophet, thus throwing light on some of the sins of the Makkans in later times.
The Midianites were a commercial people, and their besetting sin was commercial selfishness and fraudulent dealings in weights and measures. Their Prophet tells them that that is the surest way to cut short their "prosperity", both in the material and the spiritual sense. When the Day of Judgment comes, it will search out their dealings through and through: "it will compass them all round," and they will not be able to escape then, however much they may conceal their frauds in this world.