Surah Al-Kahf (The Cave), Verse 77

فَانْطَلَقَا حَتّٰۤی اِذَاۤ اَتَیَاۤ اَهْلَ قَرْیَةِ ݹسْتَطْعَمَاۤ اَهْلَهَا فَاَبَوْا اَنْ یُّضَیِّفُوْهُمَا فَوَجَدَا فِیْهَا جِدَارًا یُّرِیْدُ اَنْ یَّنْقَضَّ فَاَقَامَهٗ قَالَ لَوْ شِئْتَ لَتَّخَذْتَ عَلَیْهِ اَجْرًا ۟

Fantalaqaa hattaaa izaaa atayaaa ahla qaryatinis tat'amaaa ahlahaa fa abaw any yudaiyifoohumaa fawajadaa feehaa jidaarany yureedu any yanqadda fa aqaamah; qaala law shi'ta lattakhazta 'alaihi ajraa

“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!"”

Quran 18:77 (Yusuf Ali Translation)