About the Parable of the Prodigal Son

{About the Parable of the Prodigal Son} Can you please teach us about the Parable of the Prodigal Son, specifically focusing on the obedient son who stays in his father's house and ends up resenting his prodigal brother? It seems like there's no real benefit to being the obedient son in that situation. Am I missing cultural context that would enhance my understanding of this parable?