Sunan Ibn Majah 1928
سنن ابن ماجه#1928Da'ifIt was narrated that 'Umar bin Khattab said: “The Messenger of Allah forbade practicing coitus interruptus with a free woman except with her consent.”
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-AlbaniDaif
Muhammad Fouad Abd al-BaqiDaif
Shuaib Al ArnautDaif
In-book reference: 9:84