The sixth aliyah continues the conversation of G-d and Moshe on Mt. Sinai. G-d says He will do wonders for the Jewish people driving out the nations of Canaan before them. G-d gives instructions to destroy the altars of those nations, and not to make any covenants with them.
G-d gives over various additional commandments. These include not making any molten gods, not to eat chametz on Pesach, and to sanctify the first- born male (pidyon haben) and cattle. Also given here: not to work on Shabbos, observation of the festival of Shavous, and finally, not cooking meat and milk together.