لَوْلَا جَاءُوا عَلَيْهِ بِأَرْبَعَةِ شُهَدَاءَ ۚ فَإِذْ لَمْ يَأْتُوا بِالشُّهَدَاءِ فَأُولَٰئِكَ عِنْدَ اللَّهِ هُمُ الْكَاذِبُونَ

Surah An-Nur : 13
Why did they [who slandered] not produce for it four witnesses? And when they do not produce the witnesses, then it is they, in the sight of Allah, who are the liars.

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