Our people should not yoke up with labor unions

In Disregard of the Decalogue 

These unions are one of the signs of the last days. Men are binding up in bundles ready to be burned. They may be church members, but while they belong to these unions, they cannot possibly keep the commandments of God; for to belong to these unions means to disregard the entire Decalogue.

Unions That Are Formed or Shall Be Formed 

Those who claim to be the children of God are in no case to bind up with the labor unions that are formed or that shall be formed. This the Lord forbids. Cannot those who study the prophecies see and understand what is before us?--Letter 201, 1902.

Conflicts Between Trade Confederacies and Labor Unions 

The work of the people of God is to prepare for the events of the future, which will soon come upon them with blinding force. In the world gigantic monopolies will be formed. Men will bind themselves together in unions that will wrap them in the folds of the enemy. A few men will combine to grasp all the means to be obtained in certain lines of business. Trades unions will be formed, and those who refuse to join these unions will be marked men.--Letter 26, 1903.

Avoid Party Strifes

Men have confederated to oppose the Lord of hosts. These confederacies will continue until Christ shall leave His place of intercession before the mercy-seat, and shall put on the garments of vengeance. Satanic agencies are in every city, busily organizing into parties those opposed to the law of God. Professed saints and avowed unbelievers take their stand with these parties. This is no time for the people of God to be weaklings. We cannot afford to be off our guard for a moment.--Testimonies, vol. 8, p. 42. (1904)

Labor Trouble Ahead

The trades unions will be one of the agencies that will bring upon this earth a time of trouble such as has not been since the world began.--Letter 200, 1903.

 Conflicts Between Trade Confederacies and Labor Unions

The work of the people of God is to prepare for the events of the future, which will soon come upon them with blinding force. In the world gigantic monopolies will be formed. Men will bind themselves together in unions that will wrap them in the folds of the enemy. A few men will combine to grasp all the means to be obtained in certain lines of business. Trades unions will be formed, and those who refuse to join these unions will be marked men.--Letter 26, 1903.