Heidelberg Catechism · 1563

Q70. What does it mean to be washed with Christ's blood and Spirit?

To be washed with Christ's blood means to receive forgiveness of sins from God, through grace, because of Christ's blood, poured out for us in His sacrifice on the cross. To be washed with His Spirit means to be renewed by the Holy Spirit and sanctified to be members of Christ, so that more and more we become dead to sin and lead a holy and blameless life.
Answer · Heidelberg Catechism

Scripture proofs

  1. [1]
    Ezekiel 36:25

    Then will I sprinkle clean water upon you, and ye shall be clean: from all your filthiness, and from all your idols, will I cleanse you.

    Zechariah 13:1

    In that day there shall be a fountain opened to the house of David and to the inhabitants of Jerusalem for sin and for uncleanness.

    Ephesians 1:7

    In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace;

    Hebrews 12:24

    And to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than that of Abel.

    1 Peter 1:2

    Elect according to the foreknowledge of God the Father, through sanctification of the Spirit, unto obedience and sprinkling of the blood of Jesus Christ: Grace unto you, and peace, be multiplied.

    Revelation 1:5

    And from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loved us, and washed us from our sins in his own blood,

    Revelation 7:14

    And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb.

  2. [2]
    John 3:5-8

    Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. That which is born of the flesh is flesh; and that which is born of the Spirit is spirit. Marvel not that I said unto thee, Ye must be born again. …

    Romans 6:4

    Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life.

    1 Corinthians 6:11

    And such were some of you: but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the Spirit of our God.

    Colossians 2:11-12

    In whom also ye are circumcised with the circumcision made without hands, in putting off the body of the sins of the flesh by the circumcision of Christ: Buried with him in baptism, wherein also ye are risen with him through the faith of the operation of God, who hath raised him from the dead.

Proof texts as given in the original; verse text from the King James Version.