Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap.
Galatians 6:7
King James Version (public domain)
Traditionally attributed to Paul · 1st century AD · Thirteen epistles of the New Testament are traditionally attributed to him
Context
5For every man shall bear his own burden.
6Let him that is taught in the word communicate unto him that teacheth in all good things.
7Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap.
8For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting.
9And let us not be weary in well doing: for in due season we shall reap, if we faint not.