There’s a few reasons:

1. 2 Corinthians 9:6 says, “Whoever sows sparingly will also reap sparingly, and whoever sows bountifully will also reap bountifully.”
2. Deuteronomy 17:17 speaks of how a righteous King should be characterized, “…nor shall he acquire for himself excessive silver and gold.”
   • This standard applies to all who will rule and reign with Christ.
3. Malachi 3:10 says to put God to the test, testing that he’ll bless you hard when you tithe to him your very best.

All together it means that you shouldn’t hoard wealth, but give and spend it graciously, because you can expect more of it.