An Nur, 13 Ayah
24:13
لَّوۡلَا جَآءُو عَلَيۡهِ بِأَرۡبَعَةِ شُهَدَآءَۚ فَإِذۡ لَمۡ يَأۡتُواْ بِٱلشُّهَدَآءِ فَأُوْلَٰٓئِكَ عِندَ ٱللَّهِ هُمُ ٱلۡكَٰذِبُونَ ١٣
Lawlā Jā'ū `Alayhi Bi'arba`ati Shuhadā'a ۚ Fa'idh Lam Ya'tū Bish-Shuhadā'i Fa'ūlā'ika `Inda Al-Lahi Humu Al-Kādhibūna
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.