Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
nasai-kubra:8553Ibrāhīm b. Yaʿqūb > ʿAffān > Salām Abū al-Mundhir > ʿĀṣim > Abū Wāʾil > al-Ḥārith b. Ḥassān

[Machine] "I entered the mosque and found it crowded with people, and I saw a black banner. I asked, 'What's the matter with the people today?' They replied, 'This is the Messenger of Allah ﷺ wanting to send 'Amr ibn Al-'As on a mission.'"  

الكبرى للنسائي:٨٥٥٣أَخْبَرَنَا إِبْرَاهِيمُ بْنُ يَعْقُوبَ قَالَ حَدَّثَنَا عَفَّانُ قَالَ حَدَّثَنَا سَلَامُ أَبُو الْمُنْذِرِ عَنْ عَاصِمٍ عَنْ أَبِي وَائِلٍ عَنِ الْحَارِثِ بْنِ حَسَّانَ قَالَ

«دَخَلْتُ الْمَسْجِدَ فَإِذَا الْمَسْجِدُ غَاصٌّ بِالنَّاسِ فَإِذَا رَايَةٌ سَوْدَاءُ» قُلْتُ «مَا شَأْنُ النَّاسِ الْيَوْمَ؟» قَالُوا «هَذَا رَسُولُ اللهِ ﷺ يُرِيدُ أَنْ يَبْعَثَ عَمْرَو بْنَ الْعَاصِ وَجْهًا»