en_tn_condensed/rev/01/08.md

the alpha and the omega

These are first and last letters of the Greek alphabet. Possible meanings are 1) "the one who began all things and who ends all things" or 2) "the one who has always lived and who always will live." If unclear to readers you may consider using the first and last letters of your alphabet. AT: "the A and the Z" or "the first and the last" (See: rc://en/ta/man/translate/figs-metaphor and rc://en/ta/man/translate/figs-merism)

who is to come

Existing in the future is spoken of as coming. (See: rc://en/ta/man/translate/figs-metaphor)

says the Lord God

Some languages would put "The Lord God says" at the beginning or the end of the whole sentence. (See: rc://en/ta/man/translate/writing-quotations)