Mishnah References for Numbers 24:21

וַיַּרְא֙ אֶת־הַקֵּינִ֔י וַיִּשָּׂ֥א מְשָׁל֖וֹ וַיֹּאמַ֑ר אֵיתָן֙ מֽוֹשָׁבֶ֔ךָ וְשִׂ֥ים בַּסֶּ֖לַע קִנֶּֽךָ׃

And he looked on the Kenite, and took up his parable, and said: Though firm be thy dwelling-place, And though thy nest be set in the rock;