Your tithes were already paid.

[good samaritan]

1 And I looked, and, lo, a Lamb stood on the mount Sion, and with him an hundred forty and four thousand, having his Father's name written in their foreheads. 2 And I heard a voice from heaven, as the voice of many waters, and as the voice of a great thunder:and I heard the voice of harpers harping with their harps:3 And they sung as it were a new song before the throne, and before the four beasts, and the elders:and no man could learn that song but the hundred and forty and four thousand, which were redeemed from the earth. 4 These are they which were not defiled with women; for they are virgins. These are they which follow the Lamb whithersoever he goeth. These were redeemed from among men, being the firstfruits unto God and to the Lamb. 5 And in their mouth was found no guile:for they are without fault before the throne of God.

I believe the principle of tithing and firstfruits go much deeper the monetary giving. We'll understand it better by and by.