וְכָל־הַנֹּשֵׂ֖א מִנִּבְלָתָ֑ם יְכַבֵּ֥ס בְּגָדָ֖יו וְטָמֵ֥א עַד־הָעָֽרֶב׃
And whosoever beareth aught of the carcass of them shall wash his clothes, and be unclean until the even.
Read kabbalistic (mystical) interpretation of Leviticus 11:25: and classical mystical sources.