Whoever sows sparingly will also reap sparingly, and whoever sows bountifully will also reap bountifully.
2 Corinthians 9:6 (ESV)
Those who sow in tears shall reap with shouts of joy! He who goes out weeping, bearing the seed for sowing, shall come home with shouts of joy, bringing his sheaves with him.
Psalm 126:5-6 (ESV)