The Messenger of Allah (ﷺ) forbade earnings of a slave-girl unless it is known from where it came.
Sunan Abi Dawud Book 24, Hadith 12
← Previous Hadith Rafi' ibn Rifa'ah came to a meeting of the Ansar and said: The Prophet of Allah (ﷺ) forbade us (from some things) today, and he mentioned some things. He forbade the earning of a slave-girl except what she earned with her hand. He indicated (some things) with his fingers such as baking, spinning, and ginning.

Sunan Abi Dawud Book 24, Hadith 11 Next Hadith → The Prophet (ﷺ) forbade the price paid for a dog, the hire paid to a prostitute, and the gift given to a soothsayer.

Sunan Abi Dawud Book 24, Hadith 13