Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Abdur Rahman that a Bedouin brought some camels. He was offered one hundred and thirty, one hundred and twenty dirhams for a camel, but he refused to sell. Then one of the brokers came to him and said, "I will buy all your camels from you for a thousand." The Bedouin sold them to him. Later, when the Bedouin calculated, he became very regretful and took his dispute to Hazrat Shurayh. He upheld the sale and said, "A sale is the name of deception."