This Gospel Study is from Matthew 20:1-16. Jesus tells the parable of the landowner who hires workers for his vineyard throughout the day, but when the time comes to pay them an argument ensues.
Those hired in the morning resented being paid the same as those hired later in the day. The landowner reminds them that they agreed to work for the wage he paid them and he can pay the others what he wishes.
Jesus concludes the the famous quote: “The last will be first, and the first will be last.”