Deuteronomy 33:8

On the Urim and Thummim see Exodus 28:30. Jehovah is addressed in this v., and Levi is meant by thy holy one. Three privileges of the priestly tribe are referred to in this blessing, viz. the use of the Urim and Thummim, the teaching of the Law, and the presentation of incense and sacrifice (Deuteronomy 33:10 : see on Numbers 18; Numbers 35:18; Numbers 35:9). Whom thou didst prove, etc.] At Massah and Meribah the people certainly proved and strove with Jehovah. But unless there is a change of person here, and again in Exodus 28:10, it would appear that the person addressed is still Jehovah, who is represented as having proved and contended with Levi there, in the persons of Moses and Aaron. See Numbers 20:12 and Deuteronomy 8:2.