"Every man shall give as he is able, according to the blessing of the Lord your God that He has given you."
One of the arguments against a required tithe in the NT, is that God tells us to give as we are able in the NT, not a strict percentage, as in the OT. This verse really undercuts that argument. The OT already said to give as you are able... AND to give a tenth of your increase. Obviously, everyone can give a tenth (and receive help from the church if needed), but some can give much more.