Volume 9, Book 88, Number 222:
Narrated Abu Wail:
Abu Musa and Abii Mas’ud went to ‘Ammar when ‘Ali had sent him to Kufa to exhort them to fight
(on ‘Ali’s side). They said to him, “Since you have become a Muslim, we have never seen you doing a
deed more criticizable to us than your haste in this matter.” ‘Ammar said, “Since you (both) became
Muslims, I have never seen you doing a deed more criticizable to me than your keeping away from
this matter.” Then Abu Mas’ud provided ‘Ammar and Abu Musa with two-piece outfits to wear, and
one of them went to the mosque (of Kufa).