Surah Al-Kahf 18:77

فَٱنطَلَقَا حَتَّىٰٓ إِذَآ أَتَيَآ أَهْلَ قَرْيَةٍ ٱسْتَطْعَمَآ أَهْلَهَا فَأَبَوْا۟ أَن يُضَيِّفُوهُمَا فَوَجَدَا فِيهَا جِدَارًا يُرِيدُ أَن يَنقَضَّ فَأَقَامَهُۥ ۖ قَالَ لَوْ شِئْتَ لَتَّخَذْتَ عَلَيْهِ أَجْرًا

So they set out, until when they came to the people of a town, they asked its people for food, but they refused to offer them hospitality. And they found therein a wall about to collapse, so he [i.e., al-Khiḍr] restored it. [Moses] said, "If you wished, you could have taken for it a payment."

Translation: Saheeh International

Tafsir

So they set off until when they came to the folk of a certain town namely Antioch Antākya they asked its folk for food they asked them for food by way of hospitality but they refused to extend them any hospitality. …

Excerpt from Tafsir al-Jalalayn, commentary on 18:77, via Quran.com. The reader has the full commentary and 9 more tafsirs.