Muwatta Malik 1468
موطأ مالك#1468SahihThese are the words of a Companion, not of the Prophet ﷺ. The chain is graded on its own terms.
حَدَّثَنِي مَالِكٌ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، قَالَ أَيُّمَا وَلِيدَةٍ وَلَدَتْ مِنْ سَيِّدِهَا فَإِنَّهُ لاَ يَبِيعُهَا وَلاَ يَهَبُهَا وَلاَ يُوَرِّثُهَا وَهُوَ يَسْتَمْتِعُ بِهَا فَإِذَا مَاتَ فَهِيَ حُرَّةٌ .
Malik related to me from Nafi from Abdullah ibn Umar that Umar ibn al-Khattab said, "If a slave-girl gives birth to a child by her master, he must not sell her, give her away, or bequeath her. He enjoys her and when he dies she is free
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: 38:5