Daniel 8:12

And a host was given him - That is, power; or perhaps the host of heaven - the priesthood - the whole sacrificial system, by reason of transgression. They had filled up the measure of their iniquities, in rejecting the Lord that bought them; and the daily sacrifice, being no longer of use, was given up with the rest to destruction.

Cast down the truth - Probably the whole Jewish ritual and religion.

Practiced, and prospered - Prosperity or success followed all their acts.