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And why should you not believe - an address to the disbelievers - in other words, there is nothing to prevent you from believing, in Allahu ta’ālā when the Messenger (rasūl) is calling you to believe in your Rabb, and a pledge has been taken from you (reading [it as] ukhidha mīthāqukum; otherwise akhadha mīthāqakum, 'He has taken a pledge from you') concerning it - that is to say, Allahu ta’ālā took this [pledge from you] in the world of atoms when He made them bear witness against themselves: 'Am I not your Rabb?' They said, 'Yea, indeed' [Q. 7:172] - if you are believers?, that is to say, if your intention is to believe in Him, then apply yourselves to this [duty of faith].