Musannaf Ibn Abi Shayba 9:867

Kuthayyir ibn Hisham narrated to us, from Ja'far ibn Burqan, from al-Zuhri, from Salim, from his father, who said: The Messenger of Allah (may Allah bless him and grant him peace) forbade that a woman be married [at the same time] as her paternal aunt, nor [at the same time] as her maternal aunt.