en_tn/lev/15/04.md

unclean

The bed or anything that the man sits on that other people must not touch are spoken of as if they were physically unclean. (See: rc://en/ta/man/translate/figs-metaphor)

Whoever touches his bed ... be unclean

The person whom other people may not touch is spoken of as if he were physically unclean. (See: rc://en/ta/man/translate/figs-metaphor)

until evening

"until sunset"