Remove archaic forms of the Russian verb быть (to be)
All but one forms of "быть" in present tense are obsolete and have no place in modern Russian language outside of religious texts. The correct form for ALL pronouns in present tense is "eсть". Check the table on the following page of the Russian (not English!) wiktionary page for correct forms: https://ru.wiktionary.org/wiki/быть
Note that the forms in parentheses marked by the "†" character are only used in religious texts.
Aleksandr Revo commented
It seems URL formatting has failed (the "ь" should be a part of the URL too), so copy the URL manually to get to the right page.