Tafsir of As-Saffat 37:23

After that, a command will go forth to angels: فَاهْدُوهُمْ إِلَىٰ صِرَ‌اطِ الْجَحِيمِ (and show them the way to Jahannam - 37:23). When the angels will take them away, and reach close to the Bridge of Sirat, they will be commanded: YP (make them stop - they are to be questioned - 37:24). Thereupon, at this place, they will be questioned about their beliefs and deeds - that have been mentioned in the Qur'an and Hadith at many places.