'Myself' in the Bible

A man of God came to Eli and said to him, "This is what the Lord says: 'Did I not plainly reveal myself to your ancestor's house when they were in Egypt in the house of Pharaoh?

Then I will raise up for myself a faithful priest. He will do what is in my heart and soul. I will build for him a secure dynasty and he will serve my chosen one for all time.

The Lord said to Samuel, "How long do you intend to mourn for Saul? I have rejected him as king over Israel. Fill your horn with olive oil and go! I am sending you to Jesse in Bethlehem, for I have selected a king for myself from among his sons."