Psalms 21:12 Halakhah

כִּי־נָט֣וּ עָלֶ֣יךָ רָעָ֑ה חָֽשְׁב֥וּ מְ֝זִמָּ֗ה בַּל־יוּכָֽלוּ׃

For they intended evil against thee, They imagined a device, wherewith they shall not prevail.

Read halakhic rulings (Jewish law) on Psalms 21:12: and classical halakhic sources.