Musannaf Ibn Abi Shaybah 22282 — The earnings of a cupper

It is narrated from Sayyiduna Rafi' bin Khadij (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: The earnings of cupping are impure (khabith), the earnings from a prostitute's dowry are impure, and the price of a dog is impure.