24:16
وَلَوْلَآ إِذْ سَمِعْتُمُوهُ قُلْتُم مَّا يَكُونُ لَنَآ أَن نَّتَكَلَّمَ بِهَـٰذَا سُبْحَـٰنَكَ هَـٰذَا بُهْتَـٰنٌ عَظِيمٌ
walawlā idh samiʿ'tumūhu qul'tum mā yakūnu lanā an natakallama bihādhā sub'ḥānaka hādhā buh'tānun ʿaẓīmun
When you heard the lie, why did you not say, ‘We should not repeat this- God forbid!- It is a monstrous slander’?
And why did you not, when you heard it, say: "It is not right for us to speak of this. Glory be to You (O Allâh)! This is a great lie."