Sunan Ibn Majah 2192
سنن ابن ماجه#2192Da'ifحَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا مَالِكُ بْنُ أَنَسٍ، قَالَ بَلَغَنِي عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ النَّبِيَّ ـ صلى الله عليه وسلم ـ نَهَى عَنْ بَيْعِ الْعُرْبَانِ .
It was narrated from 'Amr bin Shu'aib, from his father, from his grandfather that :the Prophet (ﷺ) forbade the deal involving earnest money
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:
Al-AlbaniDaif
Muhammad Fouad Abd al-BaqiDaif
Shuaib Al ArnautDaif
Zubair Ali ZaiHasan
In-book reference: 12:56