Sahih al-Bukhari 2164
صحيح البخاري#2164Sahihحَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ، قَالَ حَدَّثَنِي التَّيْمِيُّ، عَنْ أَبِي عُثْمَانَ، عَنْ عَبْدِ اللَّهِ ـ رضى الله عنه ـ قَالَ مَنِ اشْتَرَى مُحَفَّلَةً فَلْيَرُدَّ مَعَهَا صَاعًا. قَالَ وَنَهَى النَّبِيُّ صلى الله عليه وسلم عَنْ تَلَقِّي الْبُيُوعِ.
Narrated `Abdullah:Whoever buys an animal which has been kept unmilked for a long time, could return it, but has to pay a Sa of dates along with it. And the Prophet (ﷺ) forbade meeting the owners of goods on the way away from the market
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 34:115