Musnad Ahmad 819:4

'Abd al-Samad narrated to us, al-Mushamma'il ibn 'Amr al-Muzani narrated to us, 'Amr ibn Sulaym al-Muzani narrated to us, from Rafi' ibn 'Amr al-Muzani, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "The 'Ajwah and the rock," or he said: "The 'Ajwah and the tree are in Paradise." Al-Mushamma'il was in doubt.