Because ye have said, We have made a covenant with death, and with hell are we at agreement; when the overflowing scourge shall pass through, it shall not come unto us: for we have made lies our refuge, and under falsehood have we hid ourselves: A covenant with death - To be in covenant with, is a kind of proverbial expression to denote perfect security from evil and mischief of any sort: -
"For thou shalt be in league with the stones of the field;
And the beasts of the field shall be at peace with thee."