When the Arab armies under Umar went to "Bayt Al-Maqdes" in 637 CE, they searched for the site of "al-masjid al-aqsa", "the farthest place of prayer/mosque", that was mentioned in the Quran and Hadith according to Islamic beliefs. Contemporary Arabic and Hebrew sources say the site was full of rubbish, and that Arabs and Jews cleaned it. The Umayyad caliph Abd al-Malik commissioned the construction of a shrine on the Temple Mount, now known as the Dome of the Rock, in the late 7th century. Two of the city's most-distinguished Arab citizens of the 10th-century were Al-Muqaddasi, the geographer, and Al-Tamimi, the physician. Al-Muqaddasi writes that Abd al-Malik built the edifice on the Temple Mount in order to compete in grandeur with Jerusalem's monumental churches.