'Begotten' in the Bible

I will tell the decree; Yahweh said to me: "You are my son; today I have begotten you.

For to which of the angels did he ever say, "You are my son, today I have begotten you," and again, "I will be {his father}, and he will be {my son}"?

Thus also Christ did not glorify himself to become high priest, but the one who said to him, "You are my Son, today I have begotten you,"