Sahih al-Bukhari 7352
Sahih al-Bukhari · Book 96: Holding Fast to the Qur'an and Sunnah · The reward for giving a verdict according to the best of knowledge
Narrated `Amr bin Al-`As:
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يَزِيدَ ، حَدَّثَنَا حَيْوَةُ ، حَدَّثَنِي يَزِيدُ بْنُ عَبْدِ اللَّهِ بْنِ الْهَادِ ، عَنْ مُحَمَّدِ بْنِ إِبْرَاهِيمَ بْنِ الْحَارِثِ ، عَنْ بُسْرِ بْنِ سَعِيدٍ ، عَنْ أَبِي قَيْسٍ ، مَوْلَى عَمْرِو بْنِ الْعَاصِ عَنْ عَمْرِو بْنِ الْعَاصِ ، أَنَّهُ سَمِعَ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " إِذَا حَكَمَ الْحَاكِمُ فَاجْتَهَدَ ثُمَّ أَصَابَ فَلَهُ أَجْرَانِ، وَإِذَا حَكَمَ فَاجْتَهَدَ ثُمَّ أَخْطَأَ فَلَهُ أَجْرٌ " . قَالَ فَحَدَّثْتُ بِهَذَا الْحَدِيثِ أَبَا بَكْرِ بْنَ عَمْرِو بْنِ حَزْمٍ فَقَالَ هَكَذَا حَدَّثَنِي أَبُو سَلَمَةَ بْنُ عَبْدِ الرَّحْمَنِ عَنْ أَبِي هُرَيْرَةَ . وَقَالَ عَبْدُ الْعَزِيزِ بْنُ الْمُطَّلِبِ عَنْ عَبْدِ اللَّهِ بْنِ أَبِي بَكْرٍ ، عَنْ أَبِي سَلَمَةَ ، عَنِ النَّبِيِّ صلى الله عليه وسلم مِثْلَهُ .
That he heard Allah's Messenger (ﷺ) saying, "If a judge gives a verdict according to the best of his knowledge and his verdict is correct (i.e. agrees with Allah and His Apostle's verdict) he will receive a double reward, and if he gives a verdict according to the best of his knowledge and his verdict is wrong, (i.e. against that of Allah and His Apostle) even then he will get a reward ."