'Begotten' in the Bible

For to which of the angels did He ever say,“You are My Son,Today I have begotten You”? And again,“I will be a Father to HimAnd He shall be a Son to Me”?

So also Christ did not glorify Himself so as to become a high priest, but He who said to Him,“You are My Son,Today I have begotten You”;

By faith Abraham, when he was tested, offered up Isaac, and he who had received the promises was offering up his only begotten son;