Galatians 6:7-9

7Do not be deceived: God cannot be mocked. A man reaps what he sows. 8The one who sows to please his sinful nature, from that nature will reap destruction; the one who sows to please the Spirit, from the Spirit will reap eternal life. 9Let us not become weary in doing good, for at the proper time we will reap a harvest if we do not give up.