Dictionary entry

στῆθος

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

στῆθος, -ους, τό

[in LXX: Ex 28:23, 26 (29, 30) (לֵב), etc.;]

the breast: Jo 13:25 21:10, Re 15:6; as a sign of penitence, τύπτειν (εἰς) τὸ σ., Lk 18:13 23:48,†