'It is I' in the Bible

Bring no more vain offerings; incense is an abomination unto me; the new moons and sabbaths, the calling of assemblies, I cannot endure; it is iniquity, even the solemn meeting.

Yet he means not so, neither does his heart think so; but it is in his heart to destroy and cut off nations, not a few.

Therefore my people shall know my name: therefore they shall know in that day that I am he that does speak: behold, it is I.