The Prophet ﷺ said, "The maternal aunt holds the status of the mother."
عن النبي ﷺ قال: الخالة بمنزلة الأم
No references are available.
Bukhari narrated it in the Book of Reconciliation (2699), from Ubaydullah bin Musa, from Israil, from Abu Ishaq, from Bara, and he related it at length in the story of the reconciliation of Hudaybiya. This story was also narrated by Muslim (2783), except that he did not mention his statement, "The maternal aunt occupies the position of the mother."