Musnad Ahmad 788:224

Asbat ibn Muhammad narrated to us, from Yunus ibn Abi Ishaq, from Abu Burdah, from his father; and Yazid ibn Harun said: Isra'il informed us, from Abu Ishaq, from Abu Burdah, from his father, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There is no marriage except with a guardian."