I heard Allah's Messenger (ﷺ) say: Father's sister should not be combined with her brother's daughter, nor the daughter of a sister with her mother's sister.
Sahih Muslim Book 16, Hadith 41
← Previous Hadith that Allah's Messenger (ﷺ) forbade combining of four women in marriage: a woman with her father's sister, and a woman with her mother's sister.

Sahih Muslim Book 16, Hadith 40 Next Hadith → So we regarded the paternal aunt of her (wife's) father and the maternal aunt of her (wife's) father at the same level.

Sahih Muslim Book 16, Hadith 42