حَدَّثَنَا عَفَّانُ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ عَنْ عَطَاءِ بْنِ السَّائِبِ عَنْ أَبِي يَحْيَى عَنِ ابْنِ عَبَّاسٍ أَنَّ رَجُلَيْنِ اخْتَصَمَا إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَسَأَلَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ الْمُدَّعِيَ الْبَيِّنَةَ فَلَمْ يَكُنْ لَهُ بَيِّنَةٌ فَاسْتَحْلَفَ الْمَطْلُوبَ فَحَلَفَ بِاللَّهِ الَّذِي لَا إِلَهَ إِلَّا هُوَ فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّكَ قَدْ فَعَلْتَ وَلَكِنْ غُفِرَ لَكَ بِإِخْلَاصِكَ قَوْلَ لَا إِلَهَ إِلَّا اللَّهُ
مسند امام احمد بن حنبل · Hadith 2280
It was narrated from Ibn 'Abbas (RA) that two men referred a dispute to the Prophet (s&), and the Prophet (PBUH) asked the claimant for proof. He did not have any proof, so he asked the defendant to swear an oath and he swore by Allah, besides Whom there is no other god. The Messenger of Allah (PBUH) said: "You did it, but you will be forgiven for your sincerity in saying there is no god but Allah."
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020