Regarding "It throws up sparks" [Mursalat 77:32], we used to take a piece of wood three cubits long or more and set it aside for the winter, and we called it qasr.As for "as if they were yellow camels" [Mursalat 77:33], these are the cables of ships, bundled together until they are as thick as a man's waist.
{ترمى بشرر} كنا نعمد إلى الخشبة ثلاثة أذرع أو فوق ذلك، فنرفعه للشتاء، فنسميه القصر، {كأنه جملت صفر} حبال السفن، تجمع حتى تكون كأوساط الرجال.
Bukhari narrated it in tafsir (4933) from Amr bin Ali, he said, Yahya narrated to us, he said, Sufyan informed us, he said, Abdul-Rahman bin Abis narrated to me, he said, I heard Ibn Abbas, and he mentioned it.The other meaning of His saying, "as if they were yellow camels" [Mursalat 77:33], is the black camels.