Muwatta Malik 857
موطأ مالك#857SahihThese are the words of a Successor — the generation after the Companions — not of the Prophet ﷺ.
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، أَنَّهُ قَالَ مَنْ أَهْدَى بَدَنَةً جَزَاءً أَوْ نَذْرًا أَوْ هَدْىَ تَمَتُّعٍ فَأُصِيبَتْ فِي الطَّرِيقِ فَعَلَيْهِ الْبَدَلُ .
Yahya related to me from Malik that Ibn Shihab said, "If someone dedicates an animal as compensation, or for a vow, or as the sacrifice for tamattu, and misfortune befalls it on the road, he must provide a substitute
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: 20:153