A man manumitted a slave and he had no other property than that, so the Prophet (ﷺ) canceled the manumission (and sold the slave for him). Nu'aim bin Al-Nahham bought the slave from him.
Sahih al-Bukhari Book 44, Hadith 6
← Previous Hadith A man was often cheated in buying. The Prophet (ﷺ) said to him, "When you buy something, say (to the seller), No cheating." The man used to say so thenceforward .

Sahih al-Bukhari Book 44, Hadith 5 Next Hadith → Allah's Messenger (ﷺ) said, "Whoever takes a false oath so as to take the property of a Muslim (illegally) will meet Allah while He will be angry with him." Al-Ash'ath said: By Allah, that saying concerned me. I had common land with a Jew, and the Jew later on denied my ownership, so I took him to the Prophet who asked me whether I had a proof of my ownership. When I replied in the negative, the Prophet asked the Jew to take an oath. I said, "O Allah's Messenger (ﷺ)! He will take an oath and deprive me of my property." So, Allah revealed the following verse: "Verily! Those who purchase a little gain at the cost of Allah's covenant and their oaths." (3.77)

Sahih al-Bukhari Book 44, Hadith 7