Sunan Ibn Majah 1929
سنن ابن ماجه#1929SahihIt was narrated from Abu Hurairah: that the Prophet said: “A woman should not be married to a man who is married to her paternal aunt of maternal aunt (at the same time).”
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautSahih
In-book reference: 9:85