Muhammad ibn Bashshar (RA) reported from Abbad ibn Layth, the draper, who heard from Abdul Majid ibn Wahb that Adda ibn Khalid ibn Hawzah said to him, “Shall I not read to you a document that Allah’s Messenger had recorded for me.” He said, Certainly.” So he brought a document that said: This is what Adda ibn Khalid ibn Hawzah bought from Muhammad, Messenger of Allah . He bought from him a slave, or a female slave, with no disease and no wickedness and he is not unlawful’. This is a transaction between two Muslims.
[Ahmed 20357, Bukhari 34, Ibn e Majah 2251]