Hadith #178
English (English)When a judge makes a judgement and makes every effort to be correct and is correct, he has two rewards. And if he judges making every effort to be correct and is wrong, he has one reward.
Reference: صحيح البخاري، كتاب الاعتصام بالكتاب والسنة، باب أجر الحاكم إذا اجتهد فأصاب أو أخطأ، الحدیث 7352