Sayyiduna Zayd bin Thabit (may Allah be pleased with him) narrates that an Arab man came to the Messenger of Allah (peace and blessings be upon him) and asked him for the land between two mountains, so he (peace and blessings be upon him) wrote that land over to him. He accepted Islam, then went to his people and said to them: Accept Islam, for I have come to you from a man who gives gifts as though he has no fear of poverty.
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 4858