Musnad Ahmad 908:3

Aswad ibn Amir narrated to us, Sharik narrated to us, from Abu Ishaq, from Harithah, who said: We came to Khabbab to visit him, and he said: "Were it not that I heard the Messenger of Allah, peace and blessings of Allah be upon him, say: 'None of you should wish for death,' I would have wished for it."