atoning sacrifice of Christ

Heb. 9:26

Otherwise, He would have needed to suffer often since the foundation of the world; but now once at the consummation of the ages He has been manifested to put away sin by the sacrifice of Himself.

Heb. 10:12-14

12 but He, having offered one sacrifice for sins for all time, sat down at the right hand of God, 13 waiting from that time onward until His enemies be made a footstool for His feet. 14 For by one offering He has perfected for all time those who are sanctified.

John 1:29, 36

29 The next day he saw Jesus coming to him and said, Behold, the Lamb of God who takes away the sin of the world! . . . . 36 and he looked at Jesus as He walked, and said, Behold, the Lamb of God!»

1 Peter 1:19

but with precious blood, as of a lamb unblemished and spotless, the blood of Christ.