Ephesians 5:3-6 - Believers practicing such sins will not inherit God’s kingdom, but will incur the wrath of God.
Ephesians 5:25-27 - Jesus gave Himself for a glorious Church which will be sanctified, holy, without blemish.
Philippians 2:12-16 - Work out your own salvation with fear and trembling, holding fast the word of life so that: 
(1) you may become blameless, and 
(2) Paul did not labor in vain concerning you.
Philippians 3:7-14 - Paul presses on to attaining the goal of gaining Christ, knowing Him, and being found in Him.
Colossians 1:21-29 - Jesus’ desires (and Paul labors to warn and teach) to present “holy and blameless” and “perfect in Christ Jesus” those who continue in faith, not moved away from the hope of the gospel.
Colossians 3:5-6 - Believers practicing such sins beware: the wrath of God will come upon sons of disobedience.
1 Timothy 4:1 - Now the Spirit expressly says that in latter times some will depart from the faith.
1 Timothy 5:11-15 - Some younger widows are condemned; they cast off their first faith and turned after Satan.
1 Timothy 6:3-4 - Paul says that if any man teaches contrary to the words of Jesus and the doctrine of Christ is proud knowing nothing.
1 Timothy 6:9-14 - Greed and love of money drowns men in destruction and perdition; Instead, pursue godliness and lay hold on eternal life (and keep this command without blame).
1 Timothy 6:17-19 - Commands for the rich (yes, Christians) to follow, so they may lay hold on eternal life.
Titus 1:1-3 - Faith and knowledge of the truth lead to godliness, in the hope of eternal life.
Hebrews 2:1-4 - Warning about drifting away: how shall we escape, if we drift and neglect so great a salvation?
Hebrews 3:6 - We belong to Christ, if we hold fast the confidence and the rejoicing of the hope firm to the end.
Hebrews 3:12-15 - Beware of an evil heart of unbelief in departing from the living God, being hardened through the deceitfulness of sin, for we are only partakers of Christ if we hold steadfast to the end.
Hebrews 3:17-19 - The OT Jews who sinned (did not obey) could not enter into God’s rest (the Promised Land).
Hebrews 4:1 - Let us fear lest any of us come short of entering God’s rest (God’s promise of salvation).
Hebrews 4:11 - Be diligent to enter into that rest, lest anyone fall according to the OT example of disobedience.
Hebrews 6:4-8 - Those enlightened and partakers of the Holy Spirit who fall away will be rejected and burned.
Hebrews 10:26-27 - If we sin willfully after receiving knowledge of the truth, expect God’s fiery judgment.
Hebrews 10:29-31 - The Lord will judge His people. “Vengeance is Mine, I will repay”, says the Lord.
Hebrews 10:35-39 - Endure in the faith, and do not be like those who draw back to perdition.
Hebrews 12:14-15 - Pursue holiness (w/o which no one will see the Lord) lest anyone falls short of God’s grace.
Hebrews 12:15-17 - Many believers become defiled, and finding no place for repentance, are rejected.
James 1:12-16 - Love the Lord, endure temptation to sin; do not be deceived, sin results in spiritual death.
1 Peter 1:8-9 - Believing, you will receive the end of your (enduring) faith—the salvation of your souls.
2 Peter 1:10-11 - Be diligent to make your call & election sure, so you won’t stumble, but gain the kingdom.
2 Peter 2:1, 2 Peter 2:14 - The false prophets (i.e. believers) are those who have eyes full of adultery and cannot cease from sin.
2 Peter 2:20-22 - If Christians are overcome by worldly sins, they are worse off than they were before knowing the way of righteousness, they turned from the holy commandment delivered to them.
1 John 1:9 - If we confess our sins, God will forgive our sins and cleanse us from all unrighteousness.
1 John 2:3-5 - We are sure that we “know” God and are “in” Him, if we keep His commandments.
1 John 2:24-25 - If God’s word does not abide in us, the Father and the Son will not abide in us, nor we in Them, and we will not receive the promised eternal life.
1 John 3:15 - If you hate your brother, you’re like a murderer who has no eternal life abiding in him.
Jude 1:4 NIV - There are those false believers who turn the grace of our God into a license for immorality
Jude 1:20-21 - 3 things for Christians to do, while looking for God’s mercy unto eternal life.
Revelation 2:10 - Be faithful until death and Jesus will give you the crown of (eternal) life (Also see Mark 13:13above).
Revelation 2:11 - He who overcomes shall not be hurt by the second death (eternal death).
Revelation 3:5 - He who overcomes will not have his name blotted out from the Book of Life.
 Revelation 14:9-11 - Those that worship the Beast and take his mark drink of the wine of the Wrath of God and will be thrown in the Lake of Fire.
Revelation 21:8 - Anyone practicing such sins will go into the lake of fire, which is the second death.
Revelation 21:27 - Anyone practicing such sins is not in the Book of Life, and will not enter the New Jerusalem.
Revelation 22:14 - Anyone who does not do God’s commandments does not have the right to the tree of life.
Revelation 22:15 - Anyone practicing such sins will be outside the gates of the New Jerusalem.
Revelation 22:18 - If any man takes away from the prophecy of the book (i.e. the Scriptures), God will take away their name out of the Book of Life.
Source Used:
https://www.baptistboard.com/threads/your-handy-dandy-long-list-of-verses-against-osas.83484/