Deuteronomy 33:8-10

8And of Levi he said, Thy Thummim and thy Urim are for thy 1godly one, Whom thou didst prove at Massah, With whom thou didst strive at the waters of Meribah;

9Who said to his father and to his mother, I see him not, And he acknowledged not his brethren, And knew not his own children; For they have observed thy word, And kept thy covenant.

10They shall teach Jacob thine ordinances, And Israel thy law: They shall put incense before thy nostrils, And whole burnt-offering upon thine altar.