Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Musa bin Salim, may Allah have mercy on him, that when Hajjaj declared the people of the land free of obligation, a woman came to me with a letter. She believed that indeed her father had been set free. (She said:) This is the one whom Talha bin Ubaidullah bought from so-and-so, who had bought him from a young man in exchange for dinars or dirhams—five hundred dirhams, which were good, excellent, and fine—and he also paid the price, and then set him free for the sake of Allah.