Bring the whole tithe into the storehouse, so that there may be food in My house, and test Me now in this,” says the Lord of hosts, “if I will not open for you the windows of heaven and pour out for you a blessing until it overflows.
Malachi 3:10.
You shall give him the first fruits of your grain, your new wine, and your oil, and the first shearing of your sheep.
Deuteronomy 18:4