Acts 7:53

So Moses went down unto the people, and spake unto them.

And he said, The LORD came from Sinai, and rose up from Seir unto them; he shined forth from mount Paran, and he came with ten thousands of saints: from his right hand went a fiery law for them.

The chariots of God are twenty thousand, even thousands of angels: the Lord is among them, as in Sinai, in the holy place.

Wherefore then serveth the law? It was added because of transgressions, till the seed should come to whom the promise was made; and it was ordained by angels in the hand of a mediator.

For if the word spoken by angels was stedfast, and every transgression and disobedience received a just recompence of reward;