Musnad Abu Ya'la al-Mawsili 243:5

Jabara ibn al-Mughallis al-Himmani narrated to us, Abu Bakr al-Nahshali narrated to us, he said: Abu Bakr ibn Abi Musa narrated to me, from his father, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "A woman shall not be married [at the same time] as her paternal aunt, nor [at the same time] as her maternal aunt."