Deuteronomy 33:8-11 - Blessing On Levi
8 And unto Levi he said, "Thy perfectness and thy light be according unto the man of thy mercy, who thou hast tempted at Massah, when ye strove by the waters of strife. 9 He that sayeth unto his father and mother, 'I saw him not,' and unto his brethren, 'I knew not,' and to his son, 'I know not': for they have observed thy words and kept thy covenant. 10 They shall teach Jacob thy judgments and Israel thy laws. They shall put cense before thy nose and whole sacrifices upon thine altar. 11 Bless, LORD, their power, and accept the works of their hands: smite the backs of them that rise against them and of them that hate them, that they rise not again."