He who has a partner in a dwelling or a garden, it is not lawful for him to sell that until he is permitted by his partner. If he (the partner) agrees, he should go in for that, and if he disapproves of that, he should abandon (the idea of selling it).
Sahih Muslim Book 22, Hadith 166
← Previous Hadith Beware of swearing; it produces a ready sale for a commodity, but blots out the blessing.

Sahih Muslim Book 22, Hadith 165 Next Hadith → Jabir bin 'Abdullah (Allah be pleased with them) said that the Messenger of Allah (ﷺ) decreed pre-emption in every joint ownership and not divided-the one-it may be a dwelling or a garden. It is not lawful for him (for the partner) to sell that until his partner gives his consent. He (the partner) is entitled to buy it when he desires and he can abandon it if he so likes. And if he (the one partner) sells it without getting the consent of the (other partner), he has the greatest right to it.

Sahih Muslim Book 22, Hadith 167