Tafsir of Al-Muddathir 74:17

I shall force him to Sa`ud! Qatadah reported from Ibn `Abbas that he said, "Sa`ud is a rock in Hell that the disbeliever will be dragged across on his face.'' As-Suddi said, "Sa`ud is a slippery rock in Hell that he will be forced to climb.'' Mujahid said,

سٲرهقه صعودا

I shall force him to Sa`ud! "This is a harsh portion of the torment.'' Qatadah said, "It is a torment that contains no relaxation (break for relief).'' Concerning Allah's statement,

إنه فكر وقدر