וּלְגָ֣ד אָמַ֔ר בָּר֖וּךְ מַרְחִ֣יב גָּ֑ד כְּלָבִ֣יא שָׁכֵ֔ן וְטָרַ֥ף זְר֖וֹעַ אַף־קָדְקֹֽד׃
And of Gad he said: Blessed be He that enlargeth Gad; He dwelleth as a lioness, And teareth the arm, yea, the crown of the head.
Read halakhic rulings (Jewish law) on Deuteronomy 33:20 from the Mishneh Torah and classical halakhic sources, free online.