'Today I Have Begotten You' in the Bible

For to which of the angels did the Father ever say,“You are My Son,Today I have begotten (fathered) You [established You as a Son, with kingly dignity]”?And again [did He ever say to the angels],“I shall be a Father to HimAnd He shall be a Son to Me”?

So too Christ did not glorify Himself so as to be made a high priest, but He [was exalted and appointed by the One] who said to Him,“You are My Son,Today I have begotten (fathered) You [declared Your authority and rule over the nations]”;