'It is I' in the Bible

Howbeit he meaneth not so, neither doth his heart think so; but it is in his heart to destroy, and to cut off nations not a few.

and I will give thee the treasures of darkness, and hidden riches of secret places, that thou mayest know that it is I, Jehovah, who call thee by thy name, even the God of Israel.

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.

Thou wast wearied with the length of thy way; yet saidst thou not, It is in vain: thou didst find a quickening of thy strength; therefore thou wast not faint.