Muwatta Malik 917
موطأ مالك#917SahihThese 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، كَانَ يَقُولُ مَنْ غَرَبَتْ لَهُ الشَّمْسُ مِنْ أَوْسَطِ أَيَّامِ التَّشْرِيقِ وَهُوَ بِمِنًى فَلاَ يَنْفِرَنَّ حَتَّى يَرْمِيَ الْجِمَارَ مِنَ الْغَدِ .
Yahya related to me from Malik that he had heard some of the people of knowledge saying, "The pebbles used for stoning the jamras should be like the stones used as slingshot." Malik said, "I like it better if they are a little larger than that." Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to say, "Someone who is at Mina when the sun sets in the middle of the days of tashriq must not leave until he has stoned the jamras on the following day
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: 20:213