Hadith 1508 a - The Book of Emancipating Slaves - Sahih Muslim - صحيح مسلم - Collection of Actions, Sayings and Teachings of Prophet Muhammad (صلى الله عليه و سلم) - Kutub as-Sittah

20. The Book of Emancipating Slaves - كتاب العتق

5) Chapter: The prohibition of a manumitted slave taking anyone as a Mawla except the one who manumitted him

Abu Huraira (Allah be pleased with him) reported that Allah's Messenger (ﷺ) said:

He who takes anyone as his ally without the consent of his previous master, there will be the curse of Allah and that of His angels upon him, and neither, any obligatory act of his nor the supererogatory one will be accepted (by Allah).

Reference: 1508 a
English reference: Book 9, Hadith 3599
In-book reference: Book 20, Hadith 22
Grade: Sahih
Read this hadith from Darussalam Collection

5) باب تَحْرِيمِ تَوَلِّي الْعَتِيقِ غَيْرَ مَوَالِيهِ ‏‏

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا يَعْقُوبُ، - يَعْنِي ابْنَ عَبْدِ الرَّحْمَنِ الْقَارِيَّ - عَنْ سُهَيْلٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏‏ ‏.‏ "‏ مَنْ تَوَلَّى قَوْمًا بِغَيْرِ إِذْنِ مَوَالِيهِ فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ لاَ يُقْبَلُ مِنْهُ عَدْلٌ وَلاَ صَرْفٌ ‏"