Lexical Definition

‎שֶׁבֶת‎ shebeth (sheh'-beth) cessation H:N-F
from ‎שָׁבַת‎

cease, sit still, loss of time.

1) cessation, a sitting still
1a) meaning dubious

Usage: 3 forms in 3 verses
Form Translated As     In Verse(s)
שָֽׁבֶת a sitting still Isa.30.7
שֶׁ֣בֶת cessation Prov.20.3
שִׁבְתּ֛וֹ sitting still his Exod.21.19

Brown-Driver-Briggs

II. ‎שֶׁ֫בֶת‎ noun feminine cessation (dubious) Prov 20:3 (with ‎מֵרִיב‎ ᵐ5 ἀποστρέφεσθαι = ‎שׁוּב‎); ‎שִׁבְתּוֺ‎ Exod 21:19 i.e. from work = his loss of time (but Di I. ‎שֶׁבֶת‎). — Isa 30:7 perhaps = a sitting still (indolently) √‎ישׁב‎, but probably corrupt, see Du Che and others

Brown-Driver-Briggs References

Book Refs
Exodus 21:19
Proverbs 20:3
Isaiah 30:7