Strong's numbers
ἱλαστήριον G2435
hilastḗrion
hil-as-tay'-ree-on
neuter of a derivative of ἱλάσκομαι; an expiatory (place or thing), i.e. (concretely) an atoning victim, or (specially) the lid of the Ark (in the Temple):--mercyseat, propitiation.
Abbott–Smith
From G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), in the public domain.
2 occurrences
Shown in the King James Version (KJV), whichever translation you read in — it is the text these numbers are tagged against.
-
Romans 3:25
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;
-
Hebrews 9:5
And over it the cherubims of glory shadowing the mercyseat; of which we cannot now speak particularly.