The word(s) "liars" appears 20 time(s) in 20 verse(s) in Quran in Muhammad Pickthal translation.

(11) Only they invent falsehood who believe not Allah's revelations, and (only) they are the liars.

(12) Nay, but We have brought them the Truth, and lo! they are liars.

(13) Why did they not produce four witnesses? Since they produce not witnesses, they verily are liars in the sight of Allah.

(14) Thou art but a mortal like us, and lo! we deem thee of the liars.

(15) They listen eagerly, but most of them are liars.

(16) (Solomon) said: We shall see whether thou speakest truth or whether thou art of the liars.

(17) And Pharaoh said: O chiefs! I know not that ye have a god other than me, so kindle for me (a fire), O Haman, to bake the mud; and set up for me a lofty tower in order that I may survey the god of Moses; and lo! I deem him of the liars.

(18) Those who disbelieve say unto those who believe: Follow our way (of religion) and we verily will bear your sins (for you). They cannot bear aught of their sins. Lo! they verily are liars.

(19) 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?

(20) 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.