John 17:17
17 "Sanctify them in the truth; Thy word is truth. NAS
1 Thessalonians 5:23
23 Now may the God of peace Himself sanctify you entirely; and may your spirit and soul and body be preserved complete, without blame at the coming of our Lord Jesus Christ. NAS
Romans 6:22
22 But now having been freed from sin and enslaved to God, you derive your benefit, resulting in sanctification, and the outcome, eternal life. NAS
2 Thessalonians 2:13
13 But we should always give thanks to God for you, brethren beloved by the Lord, because God has chosen you from the beginning for salvation through sanctification by the Spirit and faith in the truth. NAS
2 Timothy 2:21
21 Therefore, if a man cleanses himself from these things, he will be a vessel for honor, sanctified, useful to the Master, prepared for every good work. NAS
1 Peter 1:1-2
1 Peter, an apostle of Jesus Christ, to those who reside as aliens, scattered throughout Pontus, Galatia, Cappadocia, Asia, and Bithynia, who are chosen 2 according to the foreknowledge of God the Father, by the sanctifying work of the Spirit, that you may obey Jesus Christ and be sprinkled with His blood: May grace and peace be yours in fullest measure. NAS
1 Corinthians 6:11
11 And such were some of you; but you were washed, but you were sanctified, but you were justified in the name of the Lord Jesus Christ, and in the Spirit of our God.
NAS
Sanctification is a work of God, faith in Christ, and the Holy Spirit; it happens in this life not the next.