Deuteronomy 33:8 KJV

6Let Reuben live, and not die; and let not his men be few.

7And this is the blessing of Judah: and he said, Hear, LORD, the voice of Judah, and bring him unto his people: let his hands be sufficient for him; and be thou an help to him from his enemies.

8And of 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;

9Who said unto his father and to his mother, I have not seen him; neither did he acknowledge his brethren, nor knew his own children: for they have observed thy word, and kept thy covenant.

10They shall teach Jacob thy judgments, and Israel thy law: they shall put incense before thee, and whole burnt sacrifice upon thine altar.