It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Pre-emption applies in every share, in land as well as in a garden. It is not proper for anyone to sell until he informs his partner; then if he sells, his partner has more right to it, until he gives permission."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشفعة / 11595