13 distinct Greek words appear in this verse.

3 passages from patristic writers, Reformers, and church catechisms citing this verse.

• 1Cor 15:2 — By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain.
• 1Cor 15:58 — 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.
• 1Thess 1:9 — For they themselves shew of us what manner of entering in we had unto you, and how ye turned to God from idols to serve the living and true God;
• 1Thess 2:13 — For this cause also thank we God without ceasing, because, when ye received the word of God which ye heard of us, ye received it not as the word of men, but as it is in truth, the word of God, which e
• 2Thess 3:1 — Finally, brethren, pray for us, that the word of the Lord may have free course, and be glorified, even as it is with you:
• 2Thess 3:1 — Finally, brethren, pray for us, that the word of the Lord may have free course, and be glorified, even as it is with you:
• Acts 20:18 — And when they were come to him, he said unto them, Ye know, from the first day that I came into Asia, after what manner I have been with you at all seasons,
• Hab 2:13 — Behold, is it not of the LORD of hosts that the people shall labour in the very fire, and the people shall weary themselves for very vanity?
• Phil 2:16 — Holding forth the word of life; that I may rejoice in the day of Christ, that I have not run in vain, neither laboured in vain.
• Ps 127:1 — Except the LORD build the house, they labour in vain that build it: except the LORD keep the city, the watchman waketh but in vain.