Not graded
Muttafaq ‘alayh (Bukhari and Muslim) Riyad as-Salihin 1856
I heard the Messenger of Allah (ﷺ) saying, "When a judge utilizes his skill of judgement and comes to a right decision, he will have a double reward, but when he uses his judgement and commits a mistake, he will have a single reward." [Al-Bukhari and Muslim]
"إذا حكم الحاكم، فاجتهد، ثم أصاب، فله أجران، وإن حكم واجتهد، فأخطأ، فله أجر"