'Myriads' in the Bible

And he said, Jehovah came from Sinai, And rose up from Seir unto them; He shone forth from mount Paran, And he came from the myriads of the sanctuary; From his right hand went forth a law of fire for them.

His majesty is as the firstling of his ox; And his horns are as the horns of a buffalo. With them shall he push the peoples Together to the ends of the earth. These are the myriads of Ephraim, And these are the thousands of Manasseh.