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

(31) And certainly We tried those before them, so Allah will certainly know those who are true and He will certainly know the liars.

(32) And those who disbelieve say to those who believe: Follow our path and we will bear your wrongs. And never shall they be the bearers of any of their wrongs; most surely they are liars.

(33) And if they call you a liar, truly apostles before you were called liars, and to Allah are all affairs returned.

(34) And if they call you a liar, so did those before them indeed call (their apostles) liars; their apostles had come to them with clear arguments, and with scriptures, and with the illuminating book.

(35) But they called him a liar, therefore they shall most surely be brought up.

(36) Allah has begotten; and most surely they are liars.

(37) And they wonder that there has come to them a warner from among themselves, and the disbelievers say: This is an enchanter, a liar.

(38) There was none of them but called the apostles liars, so just was My retribution.

(39) Now, surely, sincere obedience is due to Allah (alone) and (as for) those who take guardians besides Him, (saying), We do not serve them save that they may make us nearer to Allah, surely Allah will judge between them in that in which they differ; surely Allah does not guide him aright who is a liar, ungrateful.

(40) And a believing man of Firon's people who hid his faith said: What! will you slay a man because he says: My Lord is Allah, and indeed he has brought to you clear arguments from your Lord? And if he be a liar, on him will be his lie, and if he be truthful, there will befall you some of that which he threatens you (with); surely Allah does not guide him who is extravagant, a liar: