Interesting since that verse has nothing to do with faith. They left something out ...
Malachi 3:9-11 NIV
You are under a curse---your whole nation---because you are robbing me.
- [10] Bring the whole tithe into the storehouse, that there may be food in my house. Test me in this,” says the Lord Almighty, “and see if I will not throw open the floodgates of heaven and pour out so much blessing that there will not be room enough to store it.
[11] I will prevent pests from devouring your crops, and the vines in your fields will not drop their fruit before it is ripe, ” says the Lord Almighty.
Seems to have to do with required grain offerings per Mosaic Law and such for the Temple; which they weren't doing.
You don't need faith to follow the law.