Tafsir of Al-Mursalat 77:33

As if they were Sufr camels. means, black camels. This is the view of Mujahid, Al-Hasan, Qatadah, and Ad-Dahhak, and Ibn Jarir favored this view. Ibn `Abbas Mujahid, and Sa`id bin Jubayr said about,

جمالت صفر

(Sufr camels.) "Meaning ropes of ships.''

إنها ترمي بشرر كالقصر

Verily, it (Hell) throws sparks as Al-Qasr. Imam Al-Bukhari recorded from Ibn `Abbas that he said: "We were directed to the timber a length of three cubits or more in order to use it for construction of buildings. We used to call it Al-Qasr

كٲنه جمالت صفر

As if they were Sufr camels. These (Jimalat) are ropes of ships that are bundled until they resemble the intestines of men.''

ويل يوميذ للمكذبين