'Behold' in the Bible

However, God finds fault with them [showing its inadequacy] when He says,“Behold, the days will come, says the Lord,When I will make and ratify a new covenantWith the house of Israel and with the house of Judah;

“Then I said, ‘Behold, I have comeTo do Your will, O God—[To fulfill] what is written of Me in the scroll of the book.’”

then He said, “Behold, I have come to do Your will.” [And so] He does away with the first [covenant as a means of atoning for sin based on animal sacrifices] so that He may inaugurate and establish the second [covenant by means of obedience].