The word(s) "kaththabun" appears 4 time(s) in 4 verse(s) in Quran.

(1) WaAAajiboo an jaahum munthirun minhum waqala alkafiroona hatha sahirun kaththabun

(سورة ص, Saad, Chapter #38, Verse #4)
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(2) Ila firAAawna wahamana waqaroona faqaloo sahirun kaththabun

(سورة غافر, Ghafir, Chapter #40, Verse #24)
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(3) Waqala rajulun muminun min ali firAAawna yaktumu eemanahu ataqtuloona rajulan an yaqoola rabbiyya Allahu waqad jaakum bialbayyinati min rabbikum wain yaku kathiban faAAalayhi kathibuhu wain yaku sadiqan yusibkum baAAdu allathee yaAAidukum inna Allaha la yahdee man huwa musrifun kaththabun

(سورة غافر, Ghafir, Chapter #40, Verse #28)
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(4) Aolqiya alththikru AAalayhi min baynina bal huwa kaththabun ashirun

(سورة القمر, Al-Qamar, Chapter #54, Verse #25)
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