Luke 15 tells the prodigal son story — but it is also the father’s story. He saw his son coming while he was still a long way off. That means he was watching the road. Every day, not knowing if today was the day, not knowing if there would be a day — watching anyway.
That is the posture this prayer comes from. Not certainty that the child will return. Not even hope on every day. Just the refusal to stop watching. To stop loving. To stop bringing the name to God.
You can pray for a prodigal child without knowing how it ends. You can bring the fear alongside the faith. You can pray thin prayers on the hard days and that is still prayer.