حَدَّثَنَا 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 (PBUH) forbade the deal involving earnest money . Translation Not Available

Book Ref: Sunan Ibn Majah Book 12 Hadith 2192
Web Ref:  Sunan Ibn Majah Vol 3 Book 12 Hadith 2192