Caravaggio, Saint Jerome Writing (c. 1605), Galleria Borghese. Public domain.
3 verses in the King James Version. Word study for “labour” →
Now he that planteth and he that watereth are one: and every man shall receive his own reward according to his own labour.
And labour, working with our own hands: being reviled, we bless; being persecuted, we suffer it:
Therefore, my beloved brethren, be ye stedfast, unmoveable, always abounding in the work of the Lord, forasmuch as ye know that your labour is not in vain in the Lord.