אַ֤ךְ אֶת־זֶה֙ תֹּֽאכְל֔וּ מִכֹּל֙ שֶׁ֣רֶץ הָע֔וֹף הַהֹלֵ֖ךְ עַל־אַרְבַּ֑ע אֲשֶׁר־לא [ל֤וֹ] כְרָעַ֙יִם֙ מִמַּ֣עַל לְרַגְלָ֔יו לְנַתֵּ֥ר בָּהֵ֖ן עַל־הָאָֽרֶץ׃
Yet these may ye eat of all winged swarming things that go upon all fours, which have jointed legs above their feet, wherewith to leap upon the earth;
Read kabbalistic (mystical) interpretation of Leviticus 11:21: and classical mystical sources.