As if they were yellowish [black] camels. (77:33)

Almuntakhab Fi Tafsir Alquran Alkarim

Sparks looking like huge implements covered with copper troubling the infidels grievously and subjecting them to a severe distress

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(77:33) which seem as though they are yellow-coloured camels. *19

As if they were yellowish [black] camels. meaning

*19) That is, each spark will be like a castle, and when these huge sparks will rise and burst and fly about in all directions it will seem as though they were yellow camels running and jumping about ceaselessly.
 

As if they were yellowish [black] camels. meaning in Urdu

(جو اچھلتی ہوئی یوں محسوس ہوں گی) گویا کہ وہ زرد اونٹ ہیں