Muhammad bin 'Amr bin 'Alqama محمد بن عمرو بن علقمة · Wages (Kitab Al-Ijarah)

The Prophet (ﷺ) said: If anyone buys a sheep whose udders have been tied up, he has option for three days (for decision). If he returns it, he should return with it wheat equal to its milk or double of it.

The Prophet (ﷺ) said: If anyone rescinds a sale with a Muslim, Allah will cancel his slip, on the Day of Resurrection.

That the Prophet (ﷺ) used to accept a gift and make return for it.