Umar ibn Sa'ad

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Umar ibn Sa'ad or Amir ibn Sad (Arabic: عمر بن سعد‎), (fl.620-680) was the son of Sa'ad ibn Abi Waqqas. A clergyman and governor of Ray city, he took orders given by Ibn Ziyad to command the troops that murderedHusayn ibn Ali in the Battle of Karbala.