'It is I' in the Bible

And David said to God, Is it not I that commanded the people to be numbered? It is I that have sinned and done evil; but these sheep, what have they done? Let thy hand, I pray thee, Jehovah my God, be on me and on my father's house; but not on thy people, that they should be smitten.

Now, behold, in my trouble I have prepared for the house of the LORD an hundred thousand talents of gold, and a thousand thousand talents of silver; and of brass and iron without weight; for it is in abundance: timber also and stone have I prepared; and thou mayest add thereto.

Riches and honor come from You, and You are the ruler of everything. Power and might are in Your hand, and it is in Your hand to make great and to give strength to all.