A slave or a manumitted slave can lead the Salat (prayer)
باب إِمَامَةِ الْعَبْدِ وَالْمَوْلَى
677
Sahih Bukhari
Sahih
حَدَّثَنَا إِبْرَاهِيمُ بْنُ الْمُنْذِرِ، قَالَ حَدَّثَنَا أَنَسُ بْنُ عِيَاضٍ، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ لَمَّا قَدِمَ الْمُهَاجِرُونَ الأَوَّلُونَ الْعُصْبَةَ ـ مَوْضِعٌ بِقُبَاءٍ ـ قَبْلَ مَقْدَمِ رَسُولِ اللَّهِ صلى الله عليه وسلم كَانَ يَؤُمُّهُمْ سَالِمٌ مَوْلَى أَبِي حُذَيْفَةَ، وَكَانَ أَكْثَرَهُمْ قُرْآنًا.
Narrated Ibn `Umar:
When the earliest emigrants came to Al-`Usba [??] a place in Quba', before the arrival of the Prophet- Salim, the slave of Abu Hudhaifa, who knew the Qur'an more than the others used to lead them in prayer.
Reference: Sahih al-Bukhari 692 In-book : Book 10, Hadith 87 USC-MSA web (English) : Vol. 1, Book 11, Hadith 661 (deprecated)
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