Musnad Ahmad 289:15

'Abd al-Rahman and Ibn Ja'far narrated to us, they said: Shu'bah narrated to us, from Ya'la ibn 'Ata', from Waki' ibn Hudus, from his paternal uncle Abu Razin, who said: I said: "O Messenger of Allah, how does Allah bring the dead to life?" He said: "Have you not passed by a barren valley, then passed by it fertile?" — Ibn Ja'far said: "Then you pass by it green?" He said: I said: "Yes." He said: "Likewise does Allah bring the dead to life."