Caravaggio, Saint Jerome Writing (c. 1605), Galleria Borghese. Public domain.
3 verses in the King James Version. Word study for “labour” →
If I be wicked, why then labour I in vain?
Wilt thou trust him, because his strength is great? or wilt thou leave thy labour to him?
She is hardened against her young ones, as though they were not hers: her labour is in vain without fear;