sentences:  In 630 CE, Khalid ibn al-Walid captured Dumat Al-Jandal and it became a part of the newly formed Islamic empire.As well as the Expedition of Khalid ibn al-Walid (2nd Dumatul Jandal) in April 631  to demolish an idol called Wadd, worshipped by the Banu Kalb tribe
  
  Umar Mosque (wrongly attributed to Umar Ibn Al-Khattab) is situated in Dumat Al-Jandal, a major intersection of ancient trade routes linking Mesopotamia, Syria with Arabia.The Mosque was built in 634-644.