لَوْلَا جَاوُوا عَلَيْهِ بِأَرْبَعَةِ شُهَدَاءWhy did they not produce four witnesses against him!meaning, to prove that what they were saying was true.فَإِذْ لَمْ يَأْتُوا بِالشُّهَدَاء فَأُوْلَيِكَ عِندَ اللَّهِ هُمُ الْكَاذِبُونَSince they have not produced witnesses! Then with Allah they are the liars.Allah has ruled that they are indeed wicked liars