عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو عَنْ أَبِيهِ عَمْرِو بْنِ الْعَاصِ قَالَ: جَاءَ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ خَصْمَانِ يَخْتَصِمَانِ، فَقَالَ لِعَمْرٍو: ((اقْضِ بَيْنَهُمَا يَا عَمْرُو!)) فَقَالَ: أَنْتَ أَوْلَى بِذَلِكَ مِنِّي يَا رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ، قَالَ: ((وَإِنْ كَانَ)) قَالَ: فَإِذَا قَضَيْتُ بَيْنَهُمَا فَمَا لِي؟ قَالَ: ((إِذَا أَنْتَ قَضَيْتَ فَأَصَبْتَ الْقَضَاءَ فَلَكَ عَشْرُ حَسَنَاتٍ، وَإِنْ أَنْتَ اجْتَهَدْتَ فَأَخْطَأْتَ فَلَكَ حَسَنَةٌ))
It is narrated from Sayyiduna Amr bin Aas (may Allah be pleased with him), he says: Two men brought a dispute to the Messenger of Allah (peace and blessings be upon him). The Prophet (peace and blessings be upon him) said to me: O Amr! Decide between them. I said: O Messenger of Allah! You are more deserving of this matter. The Prophet (peace and blessings be upon him) said: Even though I am. I said: If I decide between them, what will I get? The Prophet (peace and blessings be upon him) said: If you judge and reach the correct conclusion, you will get ten good deeds, and if you make a mistake in your judgment and err, you will get one good deed.