Sa'ad ibn Abi Waqqas(ra) The Knight of Islam Session 35 Abdul Rahman ibn Awf(ra) sends a letter to Umair(ra) about the situation with the Persians. Sa'ad ibn Abi Waqqas(ra) becomes the commander of the Muslim army. Umar(ra) gives Sa'ad ibn Abi Waqqas(ra) priceless advice which also applies to all Muslims today.