حَدَّثَنَا الْقَعْنَبِيُّ، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ أَبِي عُبَيْدٍ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ يُسْتَجَابُ لأَحَدِكُمْ مَا لَمْ يَعْجَلْ فَيَقُولُ قَدْ دَعَوْتُ فَلَمْ يُسْتَجَبْ لِي ‏"‏ ‏.‏

Abu Hurairah reported the Messenger of Allah (PBUH) as saying: "One of you is granted an answer (to his supplication) provided he does not say: 'I prayed but I was not granted an answer.'" Translation Not Available

Book Ref: Sunan Abi Dawud Book 8 Hadith 1484
Web Ref:  Sunan Abi Dawud Book 8 Hadith 1479