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.
1 Corinthians 15:58
King James Version (public domain)
Traditionally attributed to Paul · 1st century AD · Thirteen epistles of the New Testament are traditionally attributed to him
Context
56The sting of death is sin; and the strength of sin is the law.
57But thanks be to God, which giveth us the victory through our Lord Jesus Christ.
58Therefore, 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.