It is narrated from an orphan woman who was raised in the care of the Messenger of Allah (peace and blessings be upon him) that he (peace and blessings be upon him) said: "Whoever among you is able to die in Madinah, let him die there, for whoever dies in Madinah, I will be a witness or an intercessor for him on the Day of Resurrection."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21195