The word(s) "perfidious" appears 1 time(s) in 1 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) When a wave covers them like the canopy (of clouds), they call to Allah, offering Him sincere devotion. But when He has delivered them safely to land, there are among them those that halt between (right and wrong). But none reject Our Signs except only a perfidious ungrateful (wretch)!