Bible.

Exo. 23. 21 provoke him not, for he will not pardon your transgressions.

32. 32 Moses said, yet now if thou wilt forgive their sin.

34. 7 forgiving transgression and sin, and that will by no means clear the guilty.

Josh. 24. 19 is a holy a jealous God, he will not forgive your sins.

1 Kings 8. 30 hear thou in heaven, and when thou hearest forgive.

2 Chron. 7. 14 then will I hear from heaven and will forgive their sin.

Neh. 9. 17 thou art a God ready to pardon, slow to anger.

Psalm 32. 1 blessed is he whose transgression is forgiven, whose sin is covered Rom. 4. 7.

86. 5 for thou, Lord, art good and ready to forgive.