A man who owned a vineyard had two sons. One day he came to his oldest son and said “Son, work in my vineyard today”. The son said he wouldn’t go and work in the vineyard, but after he’d said no to his father he felt bad and so he went and worked in the vineyard.
The father then went to his younger son and again said “Son, work in my vineyard today”. The younger son agreed to work in the vineyard but he didn’t actually go to work in the fathers vineyard.
Jesus told this parable and then asked “Which of the two sons did what the father wanted?”. The chief priests and elders listening to Him said the first son did what the father wanted. Jesus said to them that the sinners like tax collectors would enter the kingdom of heaven before them because they believed in Jesus but they did not.