The word(s) "fluid" appears 2 time(s) in 2 verse(s) in Quran in Mohsin Khan translation.

(1) To Him is the return of all of you. The Promise of Allah is true. It is He Who begins the creation and then will repeat it, that He may reward with justice those who believed (in the Oneness of Allah - Islamic Monotheism) and did deeds of righteousness. But those who disbelieved will have a drink of boiling fluids and painful torment because they used to disbelieve.

(2) This is so! Then let them taste it - a boiling fluid and dirty wound discharges.