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:8551Aḥmad b. Sulaymān > ʿAffān > Yazīd b. Zurayʿ > Saʿīd > Qatādah > Anas

[Machine] That the son of Um-Maktum had a black flag with him for the Messenger of Allah ﷺ in some of his visions of the Prophet ﷺ.  

الكبرى للنسائي:٨٥٥١أَخْبَرَنَا أَحْمَدُ بْنُ سُلَيْمَانَ قَالَ حَدَّثَنَا عَفَّانُ قَالَ حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ قَالَ حَدَّثَنَا سَعِيدٌ قَالَ حَدَّثَنَا قَتَادَةُ عَنْ أَنَسٍ

أَنَّ ابْنَ أُمِّ مَكْتُومٍ كَانَتْ مَعَهُ رَايَةٌ سَوْدَاءُ لِرَسُولِ اللهِ ﷺ فِي بَعْضِ مَشَاهِدِ النَّبِيِّ ﷺ