Quran 44:45 from Surah Ad-Dukhaan on Divine Marvels.
كَٱلۡمُهۡلِ يَغۡلِي فِي ٱلۡبُطُونِ
English translation: Like the murky oil it will boil in the bellies
Transliteration: kal-muh'li yaghli fi al-butuni