The word(s) "fools" appears 5 time(s) in 4 verse(s) in Quran in Mohsin Khan translation.

(1) And when it is said to them (hypocrites): "Believe as the people (followers of Muhammad صلى الله عليه وسلم, Al-Ansar and Al-Muhajirun) have believed," they say: "Shall we believe as the fools have believed?" Verily, they are the fools, but they know not.

(2) And who turns away from the religion of Ibrahim (Abraham) (i.e. Islamic Monotheism) except him who befools himself? Truly, We chose him in this world and verily, in the Hereafter he will be among the righteous.

(3) The fools among the people (pagans, hypocrites, and Jews) will say, "What has turned them (Muslims) from their Qiblah [prayer direction (towards Jerusalem)] to which they used to face in prayer." Say, (O Muhammad صلى الله عليه وسلم) "To Allah belong both, east and the west. He guides whom He wills to the Straight Way."

(4) Say (O Muhammad صلى الله عليه وسلم to the polytheists): "Do you order me to worship other than Allah? O you fools!"