Word by Word Analysis

إِن نَّقُولُ إِلَّا ٱعْتَرَىٰكَ بَعْضُ ءَالِهَتِنَا بِسُوٓءٍ ۗ قَالَ إِنِّىٓ أُشْهِدُ ٱللَّهَ وَٱشْهَدُوٓا۟ أَنِّى بَرِىٓءٌ مِّمَّا تُشْرِكُونَ 54

We only say that some of our gods have possessed you with evil [i.e., insanity]." He said, "Indeed, I call Allāh to witness, and witness [yourselves] that I am free from whatever you associate with Allāh