A slave or a manumitted slave can lead the Salat (prayer)
باب إِمَامَةِ الْعَبْدِ وَالْمَوْلَى
2758
Sahih Bukhari
Sahih
حَدَّثَنَا عَمْرُو بْنُ عَوْنٍ، حَدَّثَنَا حَمَّادٌ، عَنْ ثَابِتٍ، عَنْ أَنَسٍ ـ رضى الله عنه اسْتَقْبَلَهُمُ النَّبِيُّ صلى الله عليه وسلم عَلَى فَرَسٍ عُرْىٍ، مَا عَلَيْهِ سَرْجٌ، فِي عُنُقِهِ سَيْفٌ.
Narrated Anas:
The Prophet (ﷺ) met them (i.e. the people) while he was riding an unsaddled horse with his sword slung over his shoulder.
Reference: Sahih al-Bukhari 2866 In-book : Book 56, Hadith 82 USC-MSA web (English) : Vol. 4, Book 52, Hadith 118 (deprecated)
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