(regarding) the explanation of "... It throws sparks as Al-Qasr ..." (V. 77:32): We used to collect logs of wood, three cubits long or longer, to store for heating purposes in winter, and we used to call it Al- Qasr, it also means a castle or a fort. "As if they were Jimalatun Sufr (yellow camels or bundles of ropes)" (V.77:33): means the ropes of a ship which are made in bundles till it become as wide as men's waists.
Sahih al-Bukhari Book 65, Hadith 454
← Previous Hadith (as regards the explanation of Hadith 454). 'Indeed, it (Hell) throws about sparks (huge) as Forts.' We used to collect wood in the form of logs, three cubits long or shorter. for heating purposes in winter., and we used to call such wood, the Qasr.

Sahih al-Bukhari Book 65, Hadith 453 Next Hadith → While we were with the Prophet (ﷺ) in a cave, Surat wal-Mursalat was revealed to him and he recited it, and I heard it directly from his mouth as soon as he recited its revelation. Suddenly a snake sprang at us, and the Prophet (ﷺ) said, "Kill it!" We ran to kill it but it escaped quickly. The Prophet (ﷺ) said. "It has escaped your evil, and you too have escaped its evil."

Sahih al-Bukhari Book 65, Hadith 455