Chagigah 2:6-7

Chagigah 2:6

If a person immersed in order to eat chulin (unsanctified food) and his intention was for chulin, he is not permitted to eat maaser (tithes, which are of a higher degree of sanctity). If he immersed to eat maaser and his intention was for maaser, he is not permitted to eat terumah (which is a still-higher degree of sanctity). If he immersed for terumah and his intention was for terumah, he may not eat kodesh (sanctified portions). If he immersed to eat kodesh and his intention was for kodesh, he is not permitted to handle the water with the ashes of the red heifer. However, if one immersed for a more stringent thing, the more lenient things are permitted to him. If one had no intention, it is as if he did not immerse at all.

Chagigah 2:7

The clothes of an unlearned person (who does not observe the laws of ritual purity) are considered ritually impure for those who are careful about ritual impurity (called "prushin"). The clothes of prushin are considered ritually impure for those who eat terumah. The clothes of those who eat terumah are considered ritually impure for those who eat kodesh. The clothes of those who eat kodesh are considered ritually impure for those who handle the water with the ashes of the red heifer. Yoseif ben Yoezer was a pious kohein but his handkerchief was still considered ritually impure for kodesh. Yochanan ben Gudg’da always ate everything at the level of purity needed for kodesh but his handkerchief was still considered ritually impure for the water with the ashes of the red heifer.