The parable of the Prodigal Son that Jesus illustrates is one of either a believer who has fallen back into sin or someone who knows about the Lord but decides to go back to the world.
Matthew 6:14 “For if you forgive people their wrongdoing, your heavenly Father will forgive you as well.”
Mark 11:25 “And whenever you stand praying, if you have anything against anyone, forgive him, so that your Father in heaven will also forgiv…
21 Then Peter came to Him and said, “Lord, how many times could my brother sin against me and I forgive him? As many as seven times?” Peter wanted to look merciful in the eyes of his Lord but he still fell short of God’s standards when it came to forgiveness.