Mishná sobre Baba Kama 1:6

All that require immersion in water according to the rulings of the Torah defile consecrated things, terumah, unconsecrated food, and [second] tithe; And he is forbidden to enter the sanctuary. After immersion [but before the sun sets] he defiles holy things and invalidates terumah, the words of Rabbi Meir. But the sages ruled: he invalidates consecrated things and terumah. But he is permitted to unconsecrated food and [second] tithe. And if he entered the sanctuary, whether before or after his immersion, he incurs guilt.