Surah Ibrahim 14:50

سَرَابِيلُهُم مِّن قَطِرَانٍ وَتَغْشَىٰ وُجُوهَهُمُ ٱلنَّارُ

Their garments of liquid pitch and their faces covered by the Fire

Translation: Saheeh International

Tafsir

their shirts made of pitch because it ignites fire more intensely and their faces are engulfed by the Fire

Excerpt from Tafsir al-Jalalayn, commentary on 14:50, via Quran.com. The reader has the full commentary and 9 more tafsirs.