John Lightfoot on Matthew 20:2

[Agreed for a penny a day.] A penny of silver, which one of gold exceeded twenty-four times; for A penny of gold is worth five-and-twenty of silver. The canons of the Hebrews concerning hiring of labourers distinguish, as reason requires, between being hired by the day, and being hired (only) for some hours: which may be observed also in this parable: for in the morning they are hired for all the day, and for a penny, but afterward for certain hours; and have a part of a penny allotted them, in proportion to the time they wrought.