Deuteronomy 33:20-21

JPS_ASV_Byz(i) 20 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. 21 And he chose a first part for himself, for there a portion of a ruler was reserved; and there came the heads of the people, he executed the righteousness of the LORD, and His ordinances with Israel.