If you want to have a big harvest...

"And let us not be weary in well doing: for in due season we shall reap, if we faint not."  Galatians 6:9 (see below picture for more verses.)

He that sows sparingly will reap sparingly.
He that sows liberally will reap liberally,

Whether it be sowing via.
seeds, giving, investing in souls, prayer, preaching, fasting,
study, the training and blessing of your children, family altar,
habits of honesty, hard work,
or in much more.

Keep sowing with all of your might!
-Phillip 

"Cast thy bread upon the waters: for thou shalt find it after many days."  Ecclesiastes 11:1
"In the morning sow thy seed, and in the evening withhold not thine hand:"  Ecclesiastes 11:6
"And let us not be weary in well doing: for in due season we shall reap, if we faint not."  Galatians 6:9
"The liberal soul shall be made fat: and he that watereth shall be watered also himself."  Proverbs 11:25
"He becometh poor that dealeth with a slack hand: but the hand of the diligent maketh rich. He that gathereth in summer is a wise son: but he that sleepeth in harvest is a son that causeth shame."  Proverbs 10:4-5
"Prepare thy work without, and make it fit for thyself in the field; and afterwards build thine house."  Proverbs 24:27
"Blessed are ye that sow beside all waters,"  Isaiah 32:20