He embraced Islam on the day Mecca was conquered, and his submission was exemplary. He was present at the campaigns of al-Taʾif and Tabuk, and a number of hadiths are related from him.
Those who transmitted from him include his sons — Safwan, ʿUthman and Muhammad; his brother ʿAbd al-Rahman; his nephew Safwan ibn ʿAbd Allah; ʿAbd Allah ibn Babayh; Mujahid; ʿAtaʾ; ʿIkrima; and others.
Roughly twenty hadiths are attributed to him, and some of them are found in the two Sahihs (1).
Ibn Saʿd said: “Yaʿlā ibn Munya used to issue legal opinions in Mecca.”
It is also said that he governed Najran for ʿUmar.
He was counted among the most generous and affluent of the Companions.
Rawh ibn ʿUbadah narrates from Zakariyya ibn Ishaq, from ʿAmr ibn Dinar, who said: “The first person to date written documents was Yaʿlā ibn Umayya while he was in Yemen (2).”
I (the author) say: He governed Yemen for ʿUthman, and he was among those who went out with ʿAʾisha, Talha and al-Zubayr during the incident of the Camel to seek retaliation for the blood of ʿUthman the martyr. He lavished great sums on the army, as kings are wont to do; but when they were defeated, Yaʿlā fled to Mecca and thereafter turned to his own affairs.
He lived on until shortly before the year sixty. I do not know whether he died before Muʿawiya or after him.