Muwatta Malik 1259
موطأ مالك#1259Da'ifThese are the words of a Companion, not of the Prophet ﷺ. The chain is graded on its own terms.
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ أَبِي النَّضْرِ، مَوْلَى عُمَرَ بْنِ عُبَيْدِ اللَّهِ عَنِ ابْنِ أَفْلَحَ، مَوْلَى أَبِي أَيُّوبَ الأَنْصَارِيِّ عَنْ أُمِّ وَلَدٍ، لأَبِي أَيُّوبَ الأَنْصَارِيِّ أَنَّهُ كَانَ يَعْزِلُ .
Yahya related to me from Malik from Abu'n-Nadr, the mawla of Umar ibn Ubaydullah from Ibn Aflah, the mawla of Abu Ayyub al-Ansari from an umm walad of Abu Ayyubal-Ansari that he practised coitus interruptus
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:
In-book reference: 29:56