Musnad Ahmad 354:1

Hajjaj narrated to us, Layth narrated to us, he said: Yazid ibn Abi Habib narrated to me, from Abu al-Khayr, that Junadah ibn Abi Umayyah narrated to him, that some men from the companions of the Messenger of Allah, may Allah bless him and grant him peace, some of them said: "Indeed, the migration (Hijrah) has ceased." So they differed regarding that. He said: So I went to the Messenger of Allah, may Allah bless him and grant him peace, and I said: "O Messenger of Allah, indeed some people say that the migration has ceased." The Messenger of Allah, may Allah bless him and grant him peace, said: "Indeed, the migration does not cease as long as there is Jihad."