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).
Sahih al-Bukhari Book 92, Hadith 53
← Previous Hadith `Ammar stood on the pulpit at Kufa and mentioned `Aisha and her coming (to Busra) and said, "She is the wife of your Prophet in this world and in the Hereafter, but you people are being put to test in this issue."

Sahih al-Bukhari Book 92, Hadith 52 Next Hadith → I was sitting with Abu Mas`ud and Abu Musa and `Ammar. Abu Mas`ud said (to `Ammar), "There is none of your companions but, if I wish, I could find fault with him except with you. Since you joined the company of the Prophet (ﷺ) I have never seen anything done by you more criticizable by me than your haste in this issue." `Ammar said, O Abu Mas`ud ! I have never seen anything done by you or by this companion of yours (i.e., Abu Musa) more criticizable by me than your keeping away from this issue since the time you both joined the company of the Prophet." Then Abu Mas`ud who was a rich man, said (to his servant), "O boy! Bring two suits." Then he gave one to Abu Musa and the other to `Ammar and said (to them), "Put on these suits before going for the Friday prayer. "

Sahih al-Bukhari Book 92, Hadith 54