I am copying and linking to Lord’s Day 11 of the Heidelberg Catechism (1563).

This text comes from the Heidelblog.net publication of the Catechism (accessed 5 March 2023).
Q29. Why is the Son of God called JESUS, that is, Savior?
A. Because He saves us from our sins,1 and because salvation is not to be sought or found in any other.2
1 Matt 1:21. Heb 7:25. 2 Acts 4:12. * Luke 2:10,11.
Q30. Do those also believe in the only Savior Jesus, who seek their salvation and welfare of saints, of themselves, or anywhere else?
A. No, although they make their boast of Him, yet in deeds they deny the only Savior Jesus,1 for either Jesus is not a complete Savior, or they who by true faith receive this Savior, must have in Him all that is necessary to their salvation.
1 1 Cor 1:13. 1 Cor 1:30, 31. Gal 5:4. 2 Isaiah 9:7. Col 1:20. Col 2:10. John 1:16. * Matt 23, 28.
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Thank you