ק֘וּמָ֤ה יְהוָ֨ה ׀ הוֹשִׁ֘יעֵ֤נִי אֱלֹהַ֗י כִּֽי־הִכִּ֣יתָ אֶת־כָּל־אֹיְבַ֣י לֶ֑חִי שִׁנֵּ֖י רְשָׁעִ֣ים שִׁבַּֽרְתָּ׃
Arise, O LORD; save me, O my God; for Thou hast smitten all mine enemies upon the cheek, Thou hast broken the teeth of the wicked.
Read halakhic rulings (Jewish law) on Psalms 3:8: and classical halakhic sources.