Musnad Ahmad 907:66

Ibrahim ibn Mahdi narrated to us, Abu 'Awanah narrated to us, from 'Abd al-Malik ibn 'Umayr, from Jabir ibn Samurah, who said: The Prophet, may Allah bless him and grant him peace, said: "When Chosroes perishes, there will be no Chosroes after him, and when Caesar perishes, there will be no Caesar after him. By the One in Whose hand is my soul, you will surely spend their treasures in the way of Allah."