His son Abd al-Rahman was appointed governor of Homs and the Jazira and fought reputably against the Byzantines. The forty or so male descendants of Khalid died in a plague in Syria toward the end of Umayyad rule.
The passage describes Abd al-Rahman's role as governor and his success against the Byzantines. It also mentions the tragic death of many male descendants of Khalid due to a plague that occurred at the end of the Umayyad era in Syria.