al-Mughira bin Maqsam المغيرة بن مقسم · The Book of al-Bay'ah

a Bedouin asked the Messenger of Allah about emigration (Hijrah). He said: "Woe to you, emigration is very important. Do you have any camels?" He said: "Yes. He said: "Do you pay Sadaqah on them?" He said: "Yes." He said: "Do righteous deeds no matter how far away you are from the Muslims, for Allah, the Mighty and sublime, will never cause any of your deeds tobe lost."