"Any man who sells to two men, it is for the one who was first."
Sunan Ibn Majah Book 12, Hadith 54
← Previous Hadith when the Messenger of Allah (ﷺ) sent him to Makkah, he forbade him from profiting off of what he did not possess.

Sunan Ibn Majah Book 12, Hadith 53 Next Hadith → "If two (separate) authorized persons make a sale (of the same thing), then the first transaction is the one that is valid. "

Sunan Ibn Majah Book 12, Hadith 55