Now they fell down prostrated.
The magicians fell prostrate.
so the sorcerers were cast down, prostrating themselves
And the enchanters were thrown down prostrate -
So the magicians/sorcerers were thrown/thrown away prostrating
At this, the magicians fell prostrate
The magicians therefore fell down prostrate
Thereupon the sorcerers were impelled to fall down prostrate
So, all the magicians fell down prostrating themselves
Thereupon the sorcerers were impelled to fall down prostrating
And the sorcerers fell down prostrate