‘Abdallah b. ‘Amr and Abu Huraira reportad God’s Messenger as saying, “When a judge gives a decision having tried his best to decide correctly and is right, he will have a double reward; and when he gives a decision having tried his best to decide correctly and is wrong, he will have a single reward.” (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب الإمارة والقضاء / 3732
Hadith Gradingالألبانی:مُتَّفَقٌ عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (7352) و مسلم (15/ 1716)»