The word(s) "rash" appears 4 time(s) in 4 verse(s) in Quran in Muhammad Pickthal translation.

(1) And when Moses came to Our appointed tryst and his Lord had spoken unto him, he said: My Lord! Show me (Thy Self), that I may gaze upon Thee. He said: Thou wilt not see Me, but gaze upon the mountain! If it stand still in its place, then thou wilt see Me. And when his Lord revealed (His) glory to the mountain He sent it crashing down. And Moses fell down senseless. And when he woke he said: Glory unto Thee! I turn unto Thee repentant, and I am the first of (true) believers.

(2) Hath the remembrance been given unto him alone among us? Nay, but he is a rash liar.

(3) (Unto their warner it was said): To-morrow they will know who is the rash liar.

(4) And the earth with the mountains shall be lifted up and crushed with one crash,