וּלְאֵ֖לֶּה תִּטַּמָּ֑אוּ כָּל־הַנֹּגֵ֥עַ בְּנִבְלָתָ֖ם יִטְמָ֥א עַד־הָעָֽרֶב׃
And by these ye shall become unclean; whosoever toucheth the carcass of them shall be unclean until even.
Read kabbalistic (mystical) interpretation of Leviticus 11:24: and classical mystical sources.