Sunan an-Nasa'i 4484
سنن النسائي#4484SahihIt was narrated from Ibn 'Umar that:a man told the Messenger of Allah that he was always being cheated. The Messenger of Allah said to him: "When you make a deal, say: There is no intention of cheating" So, whenever the man engages in a deal he says, 'There is no intention of cheating." "(Sahih)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih Hadith
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 44:36