KJV (3) labor is

Verse ReferenceVerse Text
Job 39:16She is hardened against her young ones, as though they were not hers: her labor is in vain without fear;
Ecc 2:21For there is a man whose labor is in wisdom, and in knowledge, and in equity; yet to a man that hath not labored therein shall he leave it for his portion. This also is vanity and a great evil.
1Co 15:58Therefore, my beloved brethren, be ye steadfast, unmovable, always abounding in the work of the Lord, forasmuch as ye know that your labor is not in vain in the Lord.