Deuteronomy 27:10-14

Thou shalt therefore obey the voice of the LORD thy God, and do his commandments and his statutes, which I command thee this day.

And Moses charged the people the same day, saying,

These shall stand upon mount Gerizim to bless the people, when ye are come over Jordan; Simeon, and Levi, and Judah, and Issachar, and Joseph, and Benjamin:

And these shall stand upon mount Ebal to curse; Reuben, Gad, and Asher, and Zebulun, Dan, and Naphtali.

And the Levites shall speak, and say unto all the men of Israel with a loud voice,