Luke 11:42

“But woe to you Pharisees! for you tithe mint and rue and every herb, and pass over justice and the love of God, but these ought you to have done, and not to leave the other undone.”

His first ‘woe', but second criticism (His first was concerning ritual washing of both person and dishes), is that they are so concerned about the minutiae of tithing (setting aside one tenth of all they receive for the Temple and for the poor), even of items like mint which do not need to be tithed, that they ignore the need for behaving justly and revealing the love of God. It is right that they should tithe. But not that they should treat it as of such prime importance, in contrast with attitudes of the heart, that they see themselves as a result of it as being somehow superior to others. Far more important is it to be just and loving in their dealings with men and women. That is what will make them superior to others (although then they will not think so because they will be humble). They must give of themselves first. Then they may give of their goods.