Sunan an-Nasa'i, Book 44, Hadith 211 (In-Book) ⓘ
It was narrated that Ibn 'Umar said: "The Messenger of Allah forbade selling loyalty or giving it away." (Sahih)]
أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، قَالَ حَدَّثَنَا إِسْمَاعِيلُ بْنُ إِبْرَاهِيمَ، عَنْ شُعْبَةَ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنِ ابْنِ عُمَرَ، قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم عَنْ بَيْعِ الْوَلاَءِ وَعَنْ هِبَتِهِ .
also referenced under: Hadith 4659 (Reference) & Volume 5, Book 44, Hadith 4663 (DarusSalam)