The virtue of Dua`a (supplication) and its prerequisites

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Human is always in need of asking for mercy and knocking the doors of the sky, and supplicate to Almighty Allah to gain a great reward ( thawab ). He must supplicate to Allah to confront the temptations, and to be saved from desires, diseases, and whims. He must always be with Almighty Allah the supreme king. In this article some of the virtues of dua'a and its etiquettes and conditions.