Who are ‘those who labor’? (Elder Epifanios Theodoropoulos)

The verb ‘to labor’ means to tire yourself out, to suffer. So ‘for those who labor’, means we pray for people who’re suffering. Not from serious illness, because we’ve already mentioned the sick. This was at the time when people labored hard in mines and quarries and so on. That’s who the Church is praying for: people who work extremely hard.