The word(s) "liar" appears 53 time(s) in 49 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) And most certainly We gave Musa the Book and We sent apostles after him one after another; and We gave Isa, the son of Marium, clear arguments and strengthened him with the holy spirit, What! whenever then an apostle came to you with that which your souls did not desire, you were insolent so you called some liars and some you slew.

(2) But whoever disputes with you in this matter after what has come to you of knowledge, then say: Come let us call our sons and your sons and our women and your women and our near people and your near people, then let us be earnest in prayer, and pray for the curse of Allah on the liars.

(3) Certainly We made a covenant with the children of Israel and We sent to them apostles; whenever there came to them an apostle with what that their souls did not desire, some (of them) did they call liars and some they slew.

(4) Nay, what they concealed before shall become manifest to them; and if they were sent back, they would certainly go back to that which they are forbidden, and most surely they are liars.

(5) We know indeed that what they say certainly grieves you, but surely they do not call you a liar; but the unjust deny the communications of Allah.

(6) But they called him a liar, so We delivered him and those with him in the ark, and We drowned those who rejected Our communications; surely they were a blind people.

(7) The chiefs of those who disbelieved from among his people said: Most surely we see you in folly, and most surely we think you to be of the liars.

(8) Those who called Shu'aib a liar were as though they had never dwelt therein; those who called Shu'aib a liar, they were the losers.

(9) Allah pardon you! Why did you give them leave until those who spoke the truth had become manifest to you and you had known the liars?

(10) And those who built a masjid to cause harm and for unbelief and to cause disunion among the believers and an ambush to him who made war against Allah and His Apostle before; and they will certainly swear: We did not desire aught but good; and Allah bears witness that they are most surely liars.