Deuteronomy 33:6

4Moses commanded us a law, even the inheritance of the congregation of Jacob.

5And he was king in Jeshurun, when the heads of the people and the tribes of Israel were gathered together.

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;