The word(s) "truthteller" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Pickthal translation.

(1) They said: Swear one to another by Allah that we verily will attack him and his household by night, and afterward we will surely say unto his friend: We witnessed not the destruction of his household. And lo! we are truthtellers.

(2) For come ye not in unto males, and cut ye not the road (for travellers), and commit ye not abomination in your meetings? But the answer of his folk was only that they said: Bring Allah's doom upon us if thou art a truthteller!