(40) باب كَيْفَ كَانَ كِمَامُ الصَّحَابَةِ
Narrated Abu Sa'eed - who is 'Abdullah bin Busr:
"I heard Abu Kabshah Al-Anmari saying: 'The Kimam (caps) of the Companions of the Messenger of Allah (ﷺ) were Buthan (stretched over the head).'"[Abu 'Eisa said:] This Hadith is Munkar, 'Abdullah bin Busr is from Al-Basrah, and he is weak according to the people of Hadith. Yahya bin Sa'eed and others graded him weak. Buthun means expansive.
Reference: Jami` at-Tirmidhi 1782
In-book reference: Book 24, Hadith 71
English translation: Vol. 3, Book 22, Hadith 1782