G2435–ἱλαστήριος–hilastērios

Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God;

ἱλαστήριον hilastērion “a propitiation”

And over it the cherubims of glory shadowing the mercyseat; of which we cannot now speak particularly.

ἱλαστήριον, hilastērion “mercy seat,”