حَدَّثَنَا عَبْدُ الْوَهَّابِ بْنُ نَجْدَةَ، وَمُوسَى بْنُ مَرْوَانَ الرَّقِّيُّ، قَالاَ حَدَّثَنَا بَقِيَّةُ بْنُ الْوَلِيدِ، عَنْ بَحِيرِ بْنِ سَعْدٍ، عَنْ خَالِدِ بْنِ مَعْدَانَ، عَنْ سَيْفٍ، عَنْ عَوْفِ بْنِ مَالِكٍ، أَنَّهُ حَدَّثَهُمْ أَنَّ النَّبِيَّ صلى الله عليه وسلم قَضَى بَيْنَ رَجُلَيْنِ ‏.‏ فَقَالَ الْمَقْضِيُّ عَلَيْهِ لَمَّا أَدْبَرَ حَسْبِيَ اللَّهُ وَنِعْمَ الْوَكِيلُ ‏.‏ فَقَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ إِنَّ اللَّهَ يَلُومُ عَلَى الْعَجْزِ وَلَكِنْ عَلَيْكَ بِالْكَيْسِ فَإِذَا غَلَبَكَ أَمْرٌ فَقُلْ حَسْبِيَ اللَّهُ وَنِعْمَ الْوَكِيلُ ‏"‏ ‏.‏

Narrated Awf ibn Malik: The Holy Prophet (PBUH) gave a decision between two men, and the one against whom the decision was given turned away and said: For me Allah sufficeth, and He is the best dispenser of affairs. The Holy Prophet (PBUH) said: Allah, Most High, blames for falling short, but apply intelligence, and when the matter gets the better of you, say; For me Allah sufficeth, and He is the best disposer of affairs. Translation Not Available

Book Ref: Sunan Abi Dawud Book 25 Hadith 3627
Web Ref:  Sunan Abi Dawud Book 24 Hadith 3620