Hakam reported

Hakam reported: There dominated in Kufa a man whose name was men- tioned as Zaman b. al-Ash'ath, who ordered Abu 'Ubaidah b. 'Abdullah to lead people in prayer…

Hakam reported: When Matar b. Najiya dominated Kufa he ordered Abu Ubaida to lead people in prayer, and the rest of the hadith is the same.