Musannaf Ibn Abi Shaybah 32710 — Reports on talk about rulers

Ya'la bin Harmalah said: Al-Hajjaj spoke on the plain of Arafat on the day of Arafah, and he spoke at great length. Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said to him: "Today is a day of remembrance." He said: Al-Hajjaj continued his sermon. Sayyiduna Abdullah repeated this two or three times, then said: "O Nafi'! Call the adhan for the prayer." Hearing this, al-Hajjaj came down from the pulpit.