The LORD is King for ever and ever: the heathen are perished out of his land. The Lord is king for ever - He has, and ever will have, the supreme power.
The heathen are perished out of his land - They are all either cut off or converted. This may refer to the Canaanites. What a mercy that we can say this of our own country! Once it was entirely heathen; now not one heathen family in the whole land.