Hebrews 10:22-23

... let us draw near to God with a sincere heart in full assurance of faith, having our hearts sprinkled to cleanse us from a guilty conscience and having our bodies washed with pure water. Let us hold unswervingly to the hope we profess, for he who promised is faithful.

let us draw near to God
Hebrews 10:1 The law is only a shadow of the good things that are coming--not the realities themselves. For this reason it can never, by the same sacrifices repeated endlessly year after year, make perfect those who draw near to worship.
Hebrews 7:19 (for the law made nothing perfect), and a better hope is introduced, by which we draw near to God.

with a sincere heart in full assurance of faith
Ephesians 3:12 In him and through faith in him we may approach God with freedom and confidence.

having our hearts sprinkled to cleanse us from a guilty conscience
Ezekiel 36:25 "'I will sprinkle clean water on you, and you will be clean; I will cleanse you from all your impurities and from all your idols.'"
Hebrews 9:14 How much more, then, will the blood of Christ, who through the eternal Spirit offered himself unblemished to God, cleanse our consciences from acts that lead to death, so that we may serve the living God!
Hebrews 12:24 ... to Jesus the mediator of a new covenant, and to the sprinkled blood that speaks a better word than the blood of Abel.
1 Peter 1:2 ... who have been chosen according to the foreknowledge of God the Father, through the sanctifying work of the Spirit, for obedience to Jesus Christ and sprinkling by his blood: Grace and peace be yours in abundance.

and having our bodies washed with pure water
Acts 22:16 "'And now what are you waiting for? Get up, be baptized and wash your sins away, calling on his name.'"

Let us hold unswervingly to the hope
Hebrews 3:6 But Christ is faithful as a son over God's house. And we are his house, if we hold on to our courage and the hope of which we boast.

we profess
Hebrews 3:1 Therefore, holy brothers, who share in the heavenly calling, fix your thoughts on Jesus, the apostle and high priest whom we confess.

for he who promised is faithful
1 Corinthians 1:9 God who has called you into fellowship with his Son Jesus Christ our Lord, is faithful.

NOTES:
Bodies washed with pure water - Exodus 30:19-21; Leviticus 8:6
The hope we profess - Hebrews 6:18-20
He who promised is faithful - 2 Timothy 2:13
Read Ephesians 1

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984 by International Bible Society. Used by permission. All rights reserved worldwide.