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And [whether you] keep secret, O people, your speech or proclaim it, He indeed, exalted be He, is Knower of what is in the breasts, of what they contain: so how much more so [is He Knower] in the case of what you utter [openly] - the reason for the revelation of this [verse] was that the idolaters said to one another: 'Speak secretly, and Muhammad's god will not hear you'.