فَلَمَّا رَأَوۡاْ بَأۡسَنَا قَالُوٓاْ ءَامَنَّا بِٱللَّهِ وَحۡدَهُۥ وَكَفَرۡنَا بِمَا كُنَّا بِهِۦ مُشۡرِكِينَ
So when they saw/understood Our might/power they said: "We believed with (in) God alone, and we disbelieved with what we were with Him sharing/making partners
Author: Literal