If we bring our tithes to God, He will bless them - Malachi 3:10
Bring ye all the tithes into the storehouse, that there may be meat in mine house, and prove me now herewith, saith the LORD of hosts, if I will not open you the windows of heaven, and pour you out a blessing, that there shall not be room enough to receive it.
We are to be faithful in bringing our tithes to God. When we are obedient in bringing to God our firstfruits, He will bless us beyond our capacity to contain it.