Where does “обѣдъ” come from?

обѣдъ (Old Church Slavonic) comes from Proto-Slavic obědъ, from Proto-Slavic oběsti, from Proto-Slavic ěsti, from Proto-Balto-Slavic ēˀstei, from Proto-Indo-European h₁édti, from Proto-Indo-European h₁ed- — to eat.

обѣдъ (Old Church Slavonic): dinner referring to the main meal of the day, usually eaten in the early afternoon