The Book of Financial Transactions
44/21. Chapter:
Artificially Inflating Prices
Sunan an-Nasai
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم نَهَى عَنِ النَّجْشِ .
It was narrated from Ibn 'Umar that: the Prophet forbade artificially inflating prices.
Reference : Sunan an-Nasa'i 4505In-book reference : Book 44, Hadith 57English translation : Vol. 5, Book 44, Hadith 4509