'Labours' in the Bible

In stripes, in imprisonments, in tumults, in labours, in watchings, in fastings;

As for Titus, remember that he is a partner with me, and is my comrade in my labours for you. And as for our brethren, remember that they are delegates from the Churches, and are men in whom Christ is glorified.

Not boasting of things without our measure, that is, of other men's labours; but having hope, when your faith is increased, that we shall be enlarged by you according to our rule abundantly,

Are they ministers of Christ? (I speak as a fool) I am more; in labours more abundant, in stripes above measure, in prisons more frequent, in deaths oft.