Jn 10:11, 1 Pt 5:3-4, Isa 63:10-14, Heb 9:19-20, Ex 24:8
In the Old Testament, it was foretold that God would rescue and lead God's people through Christ the True Shepherd. (Isa 63:10-14)
Isa 63:10 Let the word of Christ dwell in you richly in all wisdom; teaching and admonishing one another in psalms and hymns and spiritual songs, singing with grace in your hearts to the Lord. 17 And whatsoever ye do in word or deed, do all in the name of the Lord Jesus, giving thanks to God and the Father by him.
Also in the Old Testament it was foretold that our sins would be forgiven through the blood of the eternal covenant. (Heb 9:19-20, Ex 24:8)
Heb 9:19 For when Moses had spoken every precept to all the people according to the law, he took the blood of calves and of goats, with water, and scarlet wool, and hyssop, and sprinkled both the book, and all the people, 20 Saying, This is the blood of the testament which God hath enjoined unto you.
Ex 24:8 And Moses took the blood, and sprinkled it on the people, and said, Behold the blood of the covenant, which the Lord hath made with you concerning all these words.
Jesus is the Great Shepherd, the Christ, who raised us from the dead with his own blood. (Heb 13:20, Jn 10:11, 1 Pt 5:3)
Heb 13:20 Now the God of peace, that brought again from the dead our Lord Jesus, that great shepherd of the sheep, through the blood of the everlasting covenant,
Jn 10:11 I am the good shepherd: the good shepherd giveth his life for the sheep.
1 Pt 5:3 Neither as being lords over God's heritage, but being examples to the flock.