Ibn Abbas reported: When Abu Dharr heard that the Prophet, peace and blessings be upon him, had appeared in Mecca, he said to his brother, “Ride to this valley and tell me about this man who claims to have received revelation from the heavens. Listen to his words and then inform me.” The man rode along until he arrived in Mecca and he listened to the Prophet, then he returned to Abu Dharr and he said, “I have seen him order noble morals, and his speech is not that of a poet.”
Source: Ṣaḥīḥ al-Bukhārī 3861, Ṣaḥīḥ Muslim 2474
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
عَنْ ابْنِ عَبَّاسٍ قَالَ لَمَّا بَلَغَ أَبَا ذَرٍّ مَبْعَثُ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بِمَكَّةَ قَالَ لِأَخِيهِ ارْكَبْ إِلَى هَذَا الْوَادِي فَاعْلَمْ لِي عِلْمَ هَذَا الرَّجُلِ الَّذِي يَزْعُمُ أَنَّهُ يَأْتِيهِ الْخَبَرُ مِنْ السَّمَاءِ فَاسْمَعْ مِنْ قَوْلِهِ ثُمَّ ائْتِنِي فَانْطَلَقَ الْآخَرُ حَتَّى قَدِمَ مَكَّةَ وَسَمِعَ مِنْ قَوْلِهِ ثُمَّ رَجَعَ إِلَى أَبِي ذَرٍّ فَقَالَ رَأَيْتُهُ يَأْمُرُ بِمَكَارِمِ الْأَخْلَاقِ وَكَلَامًا مَا هُوَ بِالشِّعْرِ
3861 صحيح البخاري كتاب المناقب باب قصة زمزم
2474 صحيح مسلم كتاب فضائل الصحابة باب من فضائل أبي ذر رضي الله عنه