WILL a man rob God? Yet ye have robbed me; But ye say, Wherein have we robbed thee? In tithes and offerings.
YE are cursed with a curse: for ye have robbed me, even this whole nation.
BRING ye all the tithes in 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.
Malachi 3:8-10.
Who shall give?
EVERY man shall give as he is able, according to the blessing of the Lord thy God which he hath given thee.
Deuteronomy 16:17.
How much to give?
AND of all that thou shalt give me I will surely give the tenth unto thee.
Genesis 28:22.