Sunan an-Nasa'i 4499
سنن النسائي#4499Sahihأَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ قُلْتُ لأَبِي أُسَامَةَ أَحَدَّثَكُمْ عُبَيْدُ اللَّهِ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم عَنْ تَلَقِّي الْجَلَبِ حَتَّى يَدْخُلَ بِهَا السُّوقَ فَأَقَرَّ بِهِ أَبُو أُسَامَةَ وَقَالَ نَعَمْ .
It was narrated that Ibn 'Umar said:"The Messenger of Allah (ﷺ) forbade meeting traders on the way, until one enters the market with them?" Abu Usamah acknowledged it and said: Yes
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:
Abu GhuddahSahih
Al-AlbaniSahih Hadith
In-book reference: 44:51