Deuteronomy 33:8-11 - Blessing On Levi
8 And to Levi he said, Let thy Thummim and thy Urim be with thy holy one, whom thou didst prove at Massah and with whom thou didst strive at the waters of Meribah, 9 who said unto his father and to his mother, I have not seen them; neither did he acknowledge his brethren nor know his own children; therefore, they shall keep thy word and guard thy covenant. 10 They shall teach Jacob thy judgments and Israel thy law; they shall put incense before thy nostrils and a perfect sacrifice upon thine altar. 11 Bless, O LORD, his ministry, and take pleasure in the work of his hands; smite through the loins of those that rise up against him and of those that hate him that they may never rise again.