Sufyan bin 'Uyaynah سفيان بن عيينة · Wages (Kitab Al-Ijarah)

The Messenger of Allah (ﷺ) forbade earnings of a slave-girl unless it is known from where it came.

I heard the Prophet (ﷺ) say ... narrating the tradition to the same effect.

Do not go our to meet what is being brought (to market for sale). If anyone does so and buys some of it, the owner of merchandise has a choice (of canceling the deal) when it comes to the market. Abu 'Ali said: I heard Abu Dawud say: Sufyan said: none of you must buy in opposition to one another ; that is he says: I have a better one for ten (dirhams).

The people said: Messenger of Allah , prices have shot up, so fix prices for us. Thereupon the Messenger of Allah (ﷺ) said: Allah is the one Who fixes prices, Who withholds, gives lavishly and provides, and I hope that when I meet Allah, none of you will have any claim on me for an injustice regarding blood or property.

The Prophet (ﷺ) forbade payment for cat.