Matthew 20:8,9

Call the labourers, &c.— The equal reward bestowed on all,—the penny given to each labourer as his wages, signifies the Gospel, with its privileges and advantages, which they all enjoyed on an equal footing. The steward who called the labourers to receive this reward, represents the Apostles and first preachers, by whom the Gospel was offered both to Jews and Gentiles; and the rewards being first bestowed on the labourers who came at the eleventh hour, signifies, that the idolatrous Gentiles and proselytes would enjoy the Gospel with its privileges, before the Jewish nation would accept of it, the condition not of a few individuals, but of great bodies of men being represented in the parable.