Abdullah ibn Mas’ud reported: The Messenger of Allah, peace and blessings be upon him, said, “You must be truthful. Verily, truthfulness leads to righteousness and righteousness leads to Paradise. A man continues to be truthful and encourages honesty until he is recorded with Allah as truthful. And beware of falsehood. Verily, falsehood leads to wickedness and wickedness leads to the Hellfire. A man continues tell lies and encourages falsehood until he is recorded with Allah as a liar.”
Source: Ṣaḥīḥ al-Bukhārī 6094, Ṣaḥīḥ Muslim 2607
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
عَنْ عَبْدِ اللَّهِ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَيْكُمْ بِالصِّدْقِ فَإِنَّ الصِّدْقَ يَهْدِي إِلَى الْبِرِّ وَإِنَّ الْبِرَّ يَهْدِي إِلَى الْجَنَّةِ وَمَا يَزَالُ الرَّجُلُ يَصْدُقُ وَيَتَحَرَّى الصِّدْقَ حَتَّى يُكْتَبَ عِنْدَ اللَّهِ صِدِّيقًا وَإِيَّاكُمْ وَالْكَذِبَ فَإِنَّ الْكَذِبَ يَهْدِي إِلَى الْفُجُورِ وَإِنَّ الْفُجُورَ يَهْدِي إِلَى النَّارِ وَمَا يَزَالُ الرَّجُلُ يَكْذِبُ وَيَتَحَرَّى الْكَذِبَ حَتَّى يُكْتَبَ عِنْدَ اللَّهِ كَذَّابًا
6094 صحيح البخاري كتاب الأدب باب قول الله تعالى يا أيها الذين آمنوا اتقوا الله وكونوا مع الصادقين
2607 صحيح مسلم كتاب البر والصلة والآداب باب قبح الكذب وحسن الصدق وفضله