The word(s) "liars" appears 28 time(s) in 28 verse(s) in Quran in Mohsin Khan translation.

(11) In order that He may make manifest to them the truth of that wherein they differ, and that those who disbelieved (in Resurrection, and in the Oneness of Allah) may know that they were liars.

(12) And when those who associated partners with Allah see their (Allah's so-called) partners, they will say: "Our Lord! These are our partners whom we used to invoke besides you." But they will throw back their word at them (and say): "Surely! You indeed are liars!"

(13) It is only those who believe not in the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) of Allah, who fabricate falsehood, and it is they who are liars.

(14) Nay, but We have brought them the truth (Islamic Monotheism), and verily, they (disbelievers) are liars.

(15) And those who accuse chaste women, and produce not four witnesses, flog them with eighty stripes, and reject their testimony forever. They indeed are the Fasiqun (liars, rebellious, disobedient to Allah).

(16) Why did they not produce four witnesses? Since they (the slanderers) have not produced witnesses! Then with Allah they are the liars.

(17) "You are but a human being like us and verily, we think that you are one of the liars!

(18) Who gives ear (to the devils and they pour what they may have heard of the Unseen from the angels), and most of them are liars.

(19) And they belied them (those Ayat) wrongfully and arrogantly, though their ownselves were convinced thereof [i.e. those (Ayat ) are from Allah, and Musa (Moses) is the Messenger of Allah in truth, but they disliked to obey Musa (Moses), and hated to believe in his Message of Monotheism]. So see what was the end of the Mufsidun (disbelievers, disobedient to Allah, evil-doers and liars.).

(20) [Sulaiman (Solomon)] said: "We shall see whether you speak the truth or you are (one) of the liars.