Word by Word Analysis

وَيَعْبُدُونَ مِن دُونِ ٱللَّهِ مَا لَمْ يُنَزِّلْ بِهِۦ سُلْطَـٰنًا وَمَا لَيْسَ لَهُم بِهِۦ عِلْمٌ ۗ وَمَا لِلظَّـٰلِمِينَ مِن نَّصِيرٍ 71

And they worship besides Allāh that for which He has not sent down authority and that of which they have no knowledge. And there will not be for the wrongdoers any helper.