'Myriads' in the Bible

The chariots of God are myriads, thousands upon thousands;The Lord is among them as at Sinai, in holiness.

“A river of fire was flowingAnd coming out from before Him;Thousands upon thousands were attending Him,And myriads upon myriads were standing before Him;The court sat,And the books were opened.

But you have come to Mount Zion and to the city of the living God, the heavenly Jerusalem, and to myriads of angels,

Then I looked, and I heard the voice of many angels around the throne and the living creatures and the elders; and the number of them was myriads of myriads, and thousands of thousands,