Let them be blotted out of the book of the living, and not be written with the righteous. Let them be blotted out - They shall be blotted out from the land of the living. They shall be cut off from life, which they have forfeited by their cruelty and oppression. The psalmist is speaking of retributive justice; and in this sense all these passages are to be understood.
And not be written with the righteous - They shall have no title to that long life which God has promised to his followers.