Sahih Bukhari Volume 3, Book 37, Hadith 2268

حَدَّثَنِى إِبْرَاهِيمُ بْنُ مُوسَى، أَخْبَرَنَا هِشَامُ بْنُ يُوسُفَ، أَنَّ ابْنَ جُرَيْجٍ، أَخْبَرَهُمْ قَالَ أَخْبَرَنِي يَعْلَى بْنُ مُسْلِمٍ، وَعَمْرُو بْنُ دِينَارٍ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، يَزِيدُ أَحَدُهُمَا عَلَى صَاحِبِهِ، وَغَيْرُهُمَا قَالَ قَدْ سَمِعْتُهُ يُحَدِّثُهُ عَنْ سَعِيدٍ قَالَ قَالَ لِي ابْنُ عَبَّاسٍ ـ رضى الله عنهما ـ حَدَّثَنِي أُبَىُّ بْنُ كَعْبٍ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ فَانْطَلَقَا فَوَجَدَا جِدَارًا يُرِيدُ أَنْ يَنْقَضَّ ‏"‏‏.‏ قَالَ سَعِيدٌ بِيَدِهِ هَكَذَا، وَرَفَعَ يَدَيْهِ فَاسْتَقَامَ، قَالَ يَعْلَى حَسِبْتُ أَنَّ سَعِيدًا قَالَ‏.‏ فَمَسَحَهُ بِيَدِهِ فَاسْتَقَامَ ‏{‏قَالَ‏}‏ ‏"‏لَوْ شِئْتَ لاَتَّخَذْتَ عَلَيْهِ أَجْرًا ‏"‏‏.‏ قَالَ سَعِيدٌ أَجْرًا نَأْكُلُهُ‏

Narrated By Ubai bin Ka'b : Allah's Apostle said, "Both of them (Moses and Al-Khadir) proceeded on till they reached a wall which was about to fall." Sa'd said, "(Al-Khadir pointed) with his hands (towards the wall) and then raised his hands and the wall became straightened up." Ya'la said, "I think Said said, 'He (Khadir) passed his hand over it and it was straightened up." (Moses said to him), "if you had wanted, you could have taken wages for it." Said said, "Wages with which to buy food."