'Labors' in the Bible

in beatings, in imprisonments, in riots, in labors, in watchings, in fastings;

not boasting beyond proper limits in other men's labors, but having hope that as your faith grows, we will be abundantly enlarged by you in our sphere of influence,

Are they servants of Christ? (I speak as one beside himself) I am more so; in labors more abundantly, in prisons more abundantly, in stripes above measure, in deaths often.