Where does “бѣжати” come from?
бѣжати (Old Church Slavonic) comes from Proto-Slavic běžati, from Proto-Balto-Slavic bēˀgjā́ˀtei, from Proto-Indo-European bʰégʷ-y-eh₂-ti, from Proto-Indo-European bʰegʷ- — to flee; to run.
бѣжати (Old Church Slavonic): to run, escape
Ancestry of “бѣжати”, step by step