The word(s) "liar" appears 29 time(s) in 29 verse(s) in Quran in Muhammad Pickthal translation.

(1) Nay, but that hath become clear unto them which before they used to hide. And if they were sent back they would return unto that which they are forbidden. Lo! they are liars.

(2) The chieftains of his people, who were disbelieving, said: Lo! we surely see thee in foolishness, and lo! we deem thee of the liars.

(3) Or deemed ye that ye would be left (in peace) when Allah yet knoweth not those of you who strive, choosing for familiar none save Allah and His messenger and the believers? Allah is Informed of what ye do.

(4) Had it been a near adventure and an easy journey they had followed thee, but the distance seemed too far for them. Yet will they swear by Allah (saying): If we had been able we would surely have set out with you. They destroy their souls, and Allah knoweth that they verily are liars.

(5) Allah forgive thee (O Muhammad)! Wherefor didst thou grant them leave ere those who told the truth were manifest to thee and thou didst know the liars?

(6) And as for those who chose a place of worship out of opposition and disbelief, and in order to cause dissent among the believers, and as an outpost for those who warred against Allah and His messenger aforetime, they will surely swear: We purposed naught save good. Allah beareth witness that they verily are liars.

(7) The chieftains of his folk, who disbelieved, said: We see thee but a mortal like us, and we see not that any follow thee save the most abject among us, without reflection. We behold in you no merit above us - nay, we deem you liars.

(8) (Joseph) said: She it was who asked of me an evil act. And a witness of her own folk testified: If his shirt is torn from before, then she speaketh truth and he is of the liars.

(9) They said: And what shall be the penalty for it, if ye prove liars?

(10) That He may explain unto them that wherein they differ, and that those who disbelieved may know that they were liars.