Pedzisa mutsara unotevera:
Damascus yakawa muna September 634 uye Emesa yakawa muna March 635. Mugore ra 635, Mambo Heraclius akabudirira kubatana naMambo wePersia weSassanid Yazdegerd III pakukumbira kwaYazdegerd III kupwanya simba revaMuslim. Urongwa hwakanyatsorongwa hwakabvumiranwa hwokutanga kurwisa kukuru vaMuslim muIraq neSiria kamwe chete kuitira kuti vaMuslim, nemhaka yedzvinyiriro yakabva pakudzokera kuArabia uko vangatarisirwa zvakadzama gare gare, kungava nokupinda mairi kana nokudzivisa zvoupfumi nokutengeserana. Caliph Umar akabudirira kurwisa mubatanidzwa nekuisa nzira dzekumanikidza pamberi peByzantine uye nzira dzekunyengera pamberi pePersia nekupinza Yazdegerd III munhaurirano, izvi zvakaita kuti mubatanidzwa uye chirongwa chakatemwa chisarudzwe. Mauto eByzantium akakundwa zvine mutsindo muhondo yeYarmouk yakarwiwa muna Nyamavhuvhu 636, mauto ePersia akakundwa muhondo yeQadisiyyah mwedzi mitatu gare gare munaNovember 636. Kukunda kwevaMuslim kwakagumisa kutonga kweByzantine kumaodzanyemba kweAnatolia, uye Jerusarema rakawa muna Kubvumbi 637 mushure mekukombwa kwenguva refu, Umar pachake akauya kuzogamuchira kiyi yeguta nemutungamiriri weGreek Orthodox, Sophronius, uye akakokwa kunamata kuChechi yeGuva Dzvene. Umar akasarudza kunyengetera ari kure nechechi, kuti asaisa pangozi nzvimbo yayo yetemberi yechiKristu. Makore makumi mashanu namashanu gare gare, Mosque yaOmar yakavakwa panzvimbo yaakanyengeterera. Pashure pokuwa kweJerusarema, Umar akabvumira vaJudha kuti varambe vachiita zvechitendero chavo vakasununguka uye kuti vagare muJerusarema. ("Ona: Chibvumirano chaUmar I")