The story
Madyan sat on the caravan roads and grew rich the short way: shaving the measure, tipping the scales, sitting on every path to threaten and cut off travelers. To them Allah sent Shuayb, called by the scholars 'the orator of the prophets' for the beauty of his pleading. His message fused the mosque and the market: worship Allah alone, and give full measure and weight (7:85). In this religion, the scale is an altar.
They answered like every economy defending its sins: 'Does your prayer command you that we abandon what our fathers worshipped, or that we stop doing what we will with our wealth?' (11:87). His reply is a working manifesto for every honest merchant since: 'I only intend reform as much as I am able; my success is only through Allah' (11:88). He wanted no advantage over them; he would not secretly do what he forbade.
The mockery hardened, the threats of exile came, and the cry seized the wrongdoers kneeling in their homes, 'as if they had never prospered there' (11:95). Trade built Madyan; fraud erased it.