THE GOSPEL ACCORDING TO MATTHEW - Chapter 20 - Verse 12

Verse 12. The burden and the heat of the day. The burden means the heavy labour, the severe toil. We have continued at that toil, in the heat of the day. The others had worked only a little while, and that in the cool of the evening, and when it was far more pleasant and much less fatiguing.

{1} "have wrought", or, "have continued one hour only"