Reference for Leviticus 11:24

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.