Surah Al-Kahf — Ayah 77 (18:77)
فَٱنطَلَقَا حَتَّىٰٓ إِذَآ أَتَيَآ أَهۡلَ قَرۡيَةٍ ٱسۡتَطۡعَمَآ أَهۡلَهَا فَأَبَوۡاْ أَن يُضَيِّفُوهُمَا فَوَجَدَا فِيهَا جِدَارٗا يُرِيدُ أَن يَنقَضَّ فَأَقَامَهُۥۖ قَالَ لَوۡ شِئۡتَ لَتَّخَذۡتَ عَلَيۡهِ أَجۡرٗا ٧٧
English translation (Saheeh International)
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."
Brief commentary
They then walked until they came to the people of a village from whom they asked for food, but the people of the village refused to feed them and fulfil the right of hospitality towards them. Then they found a wall in the village which was tilting, and about to fall and break. So Khidr fixed it until it was straight, so Moses (peace be upon him) said to Khidr: “If you wanted to take a wage for fixing it, you could have, as we need it after they have refused to host us”.