Deuteronomy 9:18; Deuteronomy 9:21; Deuteronomy 19:15

18 And I fell down before the LORD, as at the first, forty days and forty nights: I did neither eat bread, nor drink water, because of all your sins which ye sinned , in doing wickedly in the sight of the LORD, to provoke him to anger .
21 And I took your sin, the calf which ye had made , and burnt it with fire, and stamped it, and ground it very small , even until it was as small as dust: and I cast the dust thereof into the brook that descended out of the mount.
15 One witness shall not rise up against a man for any iniquity, or for any sin, in any sin that he sinneth : at the mouth of two witnesses, or at the mouth of three witnesses, shall the matter be established .