'Myself' in the Bible

I myself will be a father to him, and he himself will be a son to me. And I will not remove my steadfast love from him as I took it away from whoever was before you.

And David said to Solomon his son, "I myself had in my heart to build a house for the name of Yahweh my God,

And King David rose to his feet and said, "Listen to me, my brothers and my people. {I myself wanted} to build a house of rest for the ark of the covenant of Yahweh and the footstool of our God, and I prepared to build.

And he said to me, 'Solomon your son, he himself shall build my house and my courts, for I have chosen him as a son to myself, and I myself will be as a father to him,