אַל־תְּשַׁקְּצוּ֙ אֶת־נַפְשֹׁ֣תֵיכֶ֔ם בְּכָל־הַשֶּׁ֖רֶץ הַשֹּׁרֵ֑ץ וְלֹ֤א תִֽטַּמְּאוּ֙ בָּהֶ֔ם וְנִטְמֵתֶ֖ם בָּֽם׃
Ye shall not make yourselves detestable with any swarming thing that swarmeth, neither shall ye make yourselves unclean with them, that ye should be defiled thereby.
Targum Jonathan on Leviticus
You shall not contaminate your souls by any reptile that creepeth, nor defile yourselves with them, lest by them you make yourselves unclean.