Verse 82

وَأَمَّا ٱلْجِدَارُ فَكَانَ لِغُلَـٰمَيْنِ يَتِيمَيْنِ فِى ٱلْمَدِينَةِ وَكَانَ تَحْتَهُۥ كَنزٌ لَّهُمَا وَكَانَ أَبُوهُمَا صَـٰلِحًا فَأَرَادَ رَبُّكَ أَن يَبْلُغَآ أَشُدَّهُمَا وَيَسْتَخْرِجَا كَنزَهُمَا رَحْمَةً مِّن رَّبِّكَ وَمَا فَعَلْتُهُۥ عَنْ أَمْرِى ذَٰلِكَ تَأْوِيلُ مَا لَمْ تَسْطِع عَّلَيْهِ صَبْرًا

As for the wall, there were a couple of orphan boys in the city and there was a treasure under the wall for them, and their parents were righteous and my decision was based on the fact that your Lord will allow them to grow to maturity and take the treasure out for themselves as a mercy from your Lord. I did not do any of these on my own. This is the interpretation of what you could not wait to find out.