Sunan an-Nasa'i 4505
سنن النسائي#4505SahihIt was narrated from Ibn 'Umar that:the Prophet forbade artificially inflating prices
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 44:57