[Machine] I was with the Messenger of Allah ﷺ when a man passed by him and asked him, "How are you, O Abdullah? Do you know him?" I said, "Yes." He asked, "What is his name?" I said, "I do not know." He asked, "Where is his house?" I said, "I do not know." He said, "Then this is not knowledge." It was narrated by Abu Dawood in Al-Marasil from Sulaiman ibn Harb, from Ibn Uyaynah, from Ibn Abi Najih, who said, "A man passed by the Prophet ﷺ and said, 'Who knows him?' A man said, 'I know him by his face but not by his name.' The Prophet said, 'That is not knowledge.' Abu Bakr Muhammad ibn Muhammad informed us, narrating from Abu Al-Husayn Al-Fasawi, from Abu Ali Al-Lu'lu'i, from Abu Dawood, who mentioned it as a Marfu' Hadith (a narration attributed to the Prophet)."  

كُنْتُ مَعَ رَسُولِ اللهِ ﷺ فَمَرَّ رَجُلٌ بِرَسُولِ اللهِ ﷺ يَسْأَلُهُ فَقَالَ كَيْفَ أَنْتَ يَا عَبْدَ اللهِ أَتَعْرِفُهُ؟ قُلْتُ نَعَمْ قَالَ مَا اسْمُهُ؟ قُلْتُ لَا أَدْرِي قَالَ فَأَيْنَ مَنْزِلُهُ؟ قَالَ قُلْتُ لَا أَدْرِي قَالَ فَلَيْسَ هَذِهِ بِمَعْرِفَةٍ كَذَا قَالَ 20399 وَرَوَاهُ أَبُو دَاوُدَ فِي الْمَرَاسِيلِ عَنْ سُلَيْمَانَ بْنِ حَرْبٍ عنِ ابنِ عُيَيْنَةَ عنِ ابنِ أَبِي نَجِيحٍ قَالَ مَرَّ رَجُلٌ عَلَى النَّبِيِّ ﷺ فَقَالَ مَنْ يَعْرِفُهُ فَقَالَ رَجُلٌ أَنَا أَعْرِفُهُ بِوَجْهِهِ وَلَا أَعْرِفُهُ بِاسْمِهِ قَالَ لَيْسَتْ تِلْكَ بِمَعْرِفَةٍ أَخْبَرَنَاهُ أَبُو بَكْرٍ مُحَمَّدُ بْنُ مُحَمَّدٍ ثنا أَبُو الْحُسَيْنِ الْفَسَوِيُّ ثنا أَبُو عَلِيٍّ اللُّؤْلُؤِيُّ ثنا أَبُو دَاوُدَ فَذَكَرَهُ مُرْسَلًا وَهُوَ الصَّحِيحُ