Re'ei - 5th Portion

Moshe teaches the Jewish people that after they settle the Land of Israel and begin working the land, G-d has obligated them to set aside a portion of their produce for the poor, and to bring a tenth of their oil, wine, and grain to the Temple-city and consume it there. This ensured that the people would regularly visit Jerusalem (which was chosen to be the Temple-city) in order to renew their spiritual inspiration.