The sermon is based on Matthew 20:1-16 (CEB)
Workers in the vineyard
20 “The kingdom of heaven is like a landowner who went out early in the morning to hire workers for his vineyard. 2 After he agreed with the workers to pay them a denarion,[a] he sent them into his vineyard.
3 “Then he went out around nine in the morning and saw others standing around the marketplace doing nothing. 4 He said to them, ‘You also go into the vineyard, and I’ll pay you whatever is right.’ 5 And they went.
“Again around noon and then at three in the afternoon, he did the same thing. 6 Around five in the afternoon he went and found others standing around, and he said to them, ‘Why are you just standing around here doing nothing all day long?’
7 “‘Because nobody has hired us,’ they replied.
“He responded, ‘You also go into the vineyard.’
8 “When evening came, the owner of the vineyard said to his manager, ‘Call the workers and give them their wages, beginning with the last ones hired and moving on finally to the first.’ 9 When those who were hired at five in the afternoon came, each one received a denarion.10 Now when those hired first came, they thought they would receive more. But each of them also received a denarion. 11 When they received it, they grumbled against the landowner, 12 ‘These who were hired last worked one hour, and they received the same pay as we did even though we had to work the whole day in the hot sun.’
13 “But he replied to one of them, ‘Friend, I did you no wrong. Didn’t I agree to pay you a denarion? 14 Take what belongs to you and go. I want to give to this one who was hired last the same as I give to you. 15 Don’t I have the right to do what I want with what belongs to me? Or are you resentful because I’m generous?’ 16 So those who are last will be first. And those who are first will be last.”