וַתְּאַזְּרֵ֣נִי חַ֭יִל לַמִּלְחָמָ֑ה תַּכְרִ֖יעַ קָמַ֣י תַּחְתָּֽי׃
For Thou hast girded me with strength unto the battle; Thou hast subdued under me those that rose up against me.
Read halakhic rulings (Jewish law) on Psalms 18:40: and classical halakhic sources.