<prompt> Translate the following text to EnglishUmar ibn al-Khattab, mrithi wa pili wa Muhammad na mshindi wa Yerusalemu mwaka 638, alikataa mwaliko wa Mkristo wa kusali kwenye Kaburi Takatifu kwa hofu kwamba wafuasi wake wangeweza kugeuza eneo hilo kuwa msikiti.  <response>: The saintly Omar Ibn el Khattab, second successor to Muhammad and the Muslim conqueror of Jerusalem in a.d. 638, declined an invitation from the Christian Patriarch to pray at the Holy Sepulcher for fear his followers might then want to turn the site into a mosque. 