Bulugh al-Maram 7 Business Transactions كتاب البيوع 37

وَعَنْ عَلِيِّ بْنِ أَبِي طَالِبٍ – رضى الله عنه – قَالَ: { أَمَرَنِي رَسُولُ اَللَّهِ – صلى الله عليه وسلم -أَنْ أَبِيعَ غُلَامَيْنِ أَخَوَيْنِ, فَبِعْتُهُمَا, فَفَرَّقْتُ بَيْنَهُمَا، فَذَكَرْتُ ذَلِكَ لِلنَّبِيِّ – صلى الله عليه وسلم -فَقَالَ: أَدْرِكْهُمَا, فَارْتَجِعْهُمَا, وَلَا تَبِعْهُمَا إِلَّا جَمِيعًا } رَوَاهُ أَحْمَدُ, وَرِجَالُهُ ثِقَاتٌ, وَقَدْ صَحَّحَهُ اِبْنُ خُزَيْمَةَ, وَابْنُ اَلْجَارُودِ, وَابْنُ حِبَّانَ, وَالْحَاكِمُ, وَالطَّبَرَانِيُّ, وَابْنُ اَلْقَطَّانِ 1 . 1 – صحيح. رواه أحمد ( 760 )، وابن الجارود ( 575 )، والحاكم ( 2 / 125 ).

Narrated ‘Ali bin Abu Talib (RA): Allah’s Messenger (صلى الله عليه وسلم) commanded me to sell two youths who were brothers. I sold them and separated them (by selling them to different people). When I made mention of that to the Prophet (صلى الله عليه وسلم), he said, “Find them and get them back, and do not sell them except that they are together.” [Reported by Ahmad, and the narrators of his chain are reliable. Indeed Ibn Khuzaimah, Ibn al-Jarud, Ibn Hibban, al-Hakim, at-Tabarani and Ibn Qattan graded it Sahih (authentic)].