כִּי֩ הִנְנִ֨י מְשַׁלֵּ֜חַ בָּכֶ֗ם נְחָשִׁים֙ צִפְעֹנִ֔ים אֲשֶׁ֥ר אֵין־לָהֶ֖ם לָ֑חַשׁ וְנִשְּׁכ֥וּ אֶתְכֶ֖ם נְאֻם־יְהוָֽה׃ (ס)
For, behold, I will send serpents, basilisks, among you, which will not be charmed; and they shall bite you, saith the LORD.
Read halakhic rulings (Jewish law) on Jeremiah 8:17: and classical halakhic sources.