Muwatta Malik 845
موطأ مالك#845SahihThese are the words of a Successor — the generation after the Companions — not of the Prophet ﷺ.
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، أَنَّ أَبَاهُ، قَالَ إِذَا اضْطُرِرْتَ إِلَى بَدَنَتِكَ فَارْكَبْهَا رُكُوبًا غَيْرَ فَادِحٍ وَإِذَا اضْطُرِرْتَ إِلَى لَبَنِهَا فَاشْرَبْ بَعْدَ مَا يَرْوَى فَصِيلُهَا فَإِذَا نَحَرْتَهَا فَانْحَرْ فَصِيلَهَا مَعَهَا .
ahya related to me from Malik from Hisham ibn Urwa that his father said, "If necessary, ride on your sacrificial animal, without burdening it, and if necessary, drink its milk after its young one has drunk its fill, and when you sacrifice it, sacrifice the young one with 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: 20:141