wa alaikumassalaam.
Tafsir ibn kathir
Those who will be gathered to Hell on their faces, such will be in an evil state, and most astray from the path. ) In the Sahih, it is reported from Anas that a man said, "O Messenger of Allah, how will the disbeliever be gathered on his face on the Day of Resurrection'' The Prophet said:
«إِنَّ الَّذِي أَمْشَاهُ عَلَى رِجْلَيْهِ قَادِرٌ أَنْ يُمْشِيَهُ عَلَى وَجْهِهِ يَوْمَ الْقِيَامَة»
(The One Who caused him to walk on his two feet is able to make him walk on his face on the Day of Resurrection.)