Al-Ahzāb - 70

﴿يَا أَيُّهَا الَّذِينَ آمَنُوا اتَّقُوا اللَّهَ وَقُولُوا قَوْلًا سَدِيدًا﴾

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70. O you who believe! Keep your duty to Allâh and fear Him, and speak (always) the truth.