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"O mankind! If you are in doubt about the Resurrection, then verily! We have created you (i.e, 'Adam) from dust, then from a Nutfah (mixed drops of male and female sexual discharge i.e, offspring of Adam), then from a clot (a piece of thick coagulated blood) then from a little lump of flesh, some formed and some unformed (miscarriage), that We may make (it) clear to you (i.e, to show you Our Power and Ability to do what We will), And We cause whom We will to remain in the wombs for an appointed term, then We bring you out as infants, then (give you growth) that you may reach your age of full strength, And among you there is he who dies (young), and among you there is he who is brought back to the miserable old age, so that he knows nothing after having known, And you see the earth barren, but when We send down water (rain) on it, it is stirred (to life), it swells and puts forth every lovely kind (of growth)." [Al-Hajj (22):5]

Narrated 'Abdullah:

When the following Verse was revealed: "It is those who believe and confuse not their belief with wrong (worshipping others besides Allah.)" (6:83), the companions of Allah's Apostle asked, "Who is amongst us who had not done injustice (wrong)?" Allah revealed: "No doubt, joining others in worship with Allah is a great injustice (wrong) indeed." (31.13) [The Book of Faith Volume 1, Book 2, Hadeeth 31]