King James Version (KJV)
Therefore my people shall know my name: therefore {they shall know} in that day that I {am} he that doth speak: behold, {it is} I.
Modern English
Therefore my people shall know my name. Therefore they shall know in that day that I am he who speaks. Behold, it is I.”
Hebrew
לָכֵ֛ן יֵדַ֥ע עַמִּ֖י שְׁמִ֑י לָכֵן֙ בַּיּ֣וֹם הַה֔וּא כִּֽי־אֲנִי־ה֥וּא הַֽמְדַבֵּ֖ר הִנֵּֽנִי׃
laken yedaʿ ʿamiy shmiy laken bayvom hahvʾ kiy-ʾaniy-hvʾ hamdaber hineniy