Muwatta Malik 896
موطأ مالك#896SahihThese are the words of a Companion, not of the Prophet ﷺ. The chain is graded on its own terms.
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، قَالَ مَنْ ضَفَرَ رَأْسَهُ فَلْيَحْلِقْ وَلاَ تَشَبَّهُوا بِالتَّلْبِيدِ .
Yahya related to me from Malik from Nafi from 'Abdullah ibn 'Umar that Umar ibn al-Khattab said, "Someone who puts plaits in his hair should shave his head, and do not plait your hair in such a way that it seems you have matted 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: 20:192