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

(21) Surely pure religion is for Allah only. And those who choose protecting friends beside Him (say): We worship them only that they may bring us near unto Allah. Lo! Allah will judge between them concerning that wherein they differ. Lo! Allah guideth not him who is a liar, an ingrate.

(22) And a believing man of Pharaoh's family, who hid his faith, said: Would ye kill a man because he saith: My Lord is Allah, and hath brought you clear proofs from your Lord? If he is lying, then his lie is upon him; and if he is truthful, then some of that wherewith he threateneth you will strike you. Lo! Allah guideth not one who is a prodigal, a liar.

(23) The roads of the heavens, and may look upon the god of Moses, though verily I think him a liar. Thus was the evil that he did made fairseeming unto Pharaoh, and he was debarred from the (right) way. The plot of Pharaoh ended but in ruin.

(24) Woe unto each sinful liar,

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

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

(27) On the day when Allah will raise them all together, then will they swear unto Him as they (now) swear unto you, and they will fancy that they have some standing. Lo! is it not they who are the liars?

(28) Hast thou not observed those who are hypocrites, (how) they tell their brethren who disbelieve among the People of the Scripture: If ye are driven out, we surely will go out with you, and we will never obey anyone against you, and if ye are attacked we verily will help you. And Allah beareth witness that they verily are liars.

(29) And no familiar friend will ask a question of his friend