Ibn Mas'ud (RAA) narrated that the Messenger of Allah (ﷺ) said:

“Adhere (you people) to truth, for truth leads to good deeds and good deeds lead to Paradise, and if a man continues to speak the truth and makes truth his object he will be recorded as truthful before Allah. Avoid (you people) falsehood, for falsehood leads to wickedness and wickedness leads to Hell, and if a man continues to speak falsehood and makes falsehood his object he will be recorded as a liar before Allah.” Agreed upon.

عَنِ اِبْنِ مَسْعُودٍ ‏- رضى الله عنه ‏- قَالَ: قَالَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-{ عَلَيْكُمْ بِالصِّدْقِ, فَإِنَّ اَلصِّدْقَ يَهْدِي إِلَى اَلْبِرِّ, وَإِنَّ اَلْبِرَّ يَهْدِي إِلَى اَلْجَنَّةِ, وَمَا يَزَالُ اَلرَّجُلُ يَصْدُقُ, وَيَتَحَرَّى اَلصِّدْقَ, حَتَّى يُكْتَبَ عِنْدَ اَللَّهِ صِدِّيقًا, وَإِيَّاكُمْ وَالْكَذِبَ, فَإِنَّ اَلْكَذِبَ يَهْدِي إِلَى اَلْفُجُورِ, وَإِنَّ اَلْفُجُورَ يَهْدِي إِلَى اَلنَّارِ, وَمَا يَزَالُ اَلرَّجُلُ يَكْذِبُ, وَيَتَحَرَّى اَلْكَذِبَ, حَتَّى يُكْتَبَ عِنْدَ اَللَّهِ كَذَّابًا } مُتَّفَقٌ عَلَيْهِ .‏ [1]‏ .‏