Muwatta Malik 1041
موطأ مالك#1041SahihThese are the words of a Companion, not of the Prophet ﷺ. The chain is graded on its own terms.
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، لَمْ يَكُنْ يُضَحِّي عَمَّا فِي بَطْنِ الْمَرْأَةِ . قَالَ مَالِكٌ الضَّحِيَّةُ سُنَّةٌ وَلَيْسَتْ بِوَاجِبَةٍ وَلاَ أُحِبُّ لأَحَدٍ مِمَّنْ قَوِيَ عَلَى ثَمَنِهَا أَنْ يَتْرُكَهَا .
Yahya related to me from Malik from Nafi that Abdullah ibn Umar did not sacrifice for the child in the womb. Malik said, "The sacrifice is sunna, and it is not obligatory. I prefer that anyone who has the price of the animal should not abandon it
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: 23:1