Narrator:Ali
وَعَنْ عَلِيٍّ - رضى الله عنه - قَالَ: قَالَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -{
" إِذَا تَقَاضَى إِلَيْكَ رَجُلَانِ, فَلَا تَقْضِ لِلْأَوَّلِ, حَتَّى تَسْمَعَ كَلَامَ اَلْآخَرِ, فَسَوْفَ تَدْرِي كَيْفَ تَقْضِي"
Narrated 'Ali (RA):
Allah's Messenger (ﷺ) said: "When two men bring a case before you, do not decide in favor of the first till you hear what the other has to say, then you will know how to judge." 'Ali (RA) said: "Since then, I have continued to judge (in accordance with that)." [Reported by Ahmad, Abu Dawud and at-Tirmidhi. The latter graded it Hasan (good), while Ibn al-Madini graded it Qawi (strong), and Ibn Hibban graded it Sahih (authentic).]
Reported by At-Tirmidhi (No. 1331) and Ahmad (No. 1148, 1218). Cited in Bulugh al-Maram (No. 1402).