Thus We roused them so they would ask themselves. A speaker from amongst them said, "How long have you stayed?" They said, "We stayed a day or part of a day." He said, "Your Lord is surely aware how long you stayed, so send one of you with these money of yours to the city, and let him see which is the tastiest food, and let him come with a provision of it. Let him be courteous and let no one take notice of you."
Translation endnotes
[18:9-27] These 19 verses contain numerous key words that strongly imply that the story of the cave have double meaning like the verses in chapter 74, and the second meaning is about a prophetic event. I have already observed examples of a hidden mathematical design, and God the most Wise will unveil it when the right time comes. When the secrets contained in the cave is revealed by divine permission, it will prove once again the truth in the assertion at 18:27. [18:16-20] If these youngsters escaped from the persecution of the Church that made the polytheistic doctrine of the Trinity the official doctrine of Christianity through the Nicene conference in 325 AC, then they woke up just after Muhammed and his supporters immigrated to Yathrib.