Gal. 6:7-9

Gal 6:7  Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap.
Gal 6:8  For 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.
Gal 6:9  And let us not be weary in well doing: for in due season we shall reap, if we faint not.