Abu Hurairah reported,

The Prophet ﷺ forbade that a woman be married while her paternal aunt is already married to the same man, or that a paternal aunt be married while her brother's daughter is already married to him, or that a woman be married while her maternal aunt is already married to him, or that a maternal aunt be married while her sister's daughter is already married to him. The younger may not be married over the elder, nor the elder over the younger.

Azami 6447

Sahih

عن أبي هريرة

عن النبي ﷺ نهى أن تنكح المرأة على عمتها، أو العمة على ابنة أخيها، أو المرأة على خالتها، أو الخالة على ابنة أختها، ولا تنكح الصغرى على الكبرى، ولا الكبرى على الصغرى.

الأعظمي 6447صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Marriage
Chapter
Prohibited marriages in Islam
Section
Prohibition of marrying a woman along with her paternal or maternal aunt
Numbering
Jami al-Kamil 6447 (2nd edition)
Azami 6447