مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3507
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn 'Abbas that The Prophet of Allah (ﷺ) forbade being married to a woman and her paternal or maternal aunt at the same time.
Musnad Ahmad 3530A saheeh hadeeth]