Sura 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

fa-inṭalaqā ḥatta idhā atayā ahla qaryatin astaṭʿamā ahlahā faabaw an yuḍayyifūhumā fa-wajadā fīhā jidāran yurīdu an yanqaḍḍa faaqāmahu qalā law shiʾta lattakhadhta ʿalayhi ajran

Then they proceeded: until, when they came to the inhabitants of a town, they asked them for food, but they refused them hospitality. They found there a wall on the point of falling down, but he set it up straight. (Moses) said: "If thou hadst wished, surely thou couldst have exacted some recompense for it!"