וְכָל־הַנֹּגֵ֖עַ בְּמִשְׁכָּבָ֑הּ יְכַבֵּ֧ס בְּגָדָ֛יו וְרָחַ֥ץ בַּמַּ֖יִם וְטָמֵ֥א עַד־הָעָֽרֶב׃
그 침상을 만지는 자는 다 옷을 빨고 물로 몸을 씻을 것이요 저녁까지 부정할 것이며
Mishnah Chagigah
The garments of an am haaretz possess midras-impurity for Pharisees. The garments of Pharisees possess midras-impurity for those who eat terumah. The garments of those who eat terumah possess midras-impurity for [those who eat] sacred things. The garments of [those who eat] sacred things possess midras-impurity for [those who occupy themselves with the waters of] purification. Yose ben Yoezer was the most pious in the priesthood, yet his apron was [considered to possess] midras-impurity for [those who ate] sacred things. Yohanan ben Gudgada all his life used to eat [unconsecrated food] in accordance with the purity required for sacred things, yet his apron was [considered to possess] midras-impurity for [those who occupied themselves with the water of] purification.