How Much Sin Can You Commit Before You Lose Your Salvation?

Hebrews 12:5-7 "…5 And you have forgotten the exhortation that addresses you as sons: “My son, do not take lightly the discipline of the Lord, and do not lose heart when He rebukes you. 6 For the Lord disciplines the one He loves, and He chastises every son He receives.” 7 Endure suffering as discipline; God is treating you as sons. For what son is not disciplined by his father?…" 

Those who practice sin without guilt over it, they were never born again. Those who are believers are tormented when they are sinning and eventually confess it to be cleansed. 

1 John 1:9 "…8 If we say we have no sin, we deceive ourselves, and the truth is not in us. 9 If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. 10 If we say we have not sinned, we make Him out to be a liar, and His word is not in us.…" 

1 John 3:9. "No one born of God makes a practice of sinning, for God 's seed abides in him; and he cannot keep on sinning, because he has been born of God. NIV No one who is born of God will continue to sin, because God's seed remains in them; they cannot go on sinning, because they have been born of God."