Sahih al-Bukhari 6340
Book 80: Invocations · Narrated by Abu Huraira
Arabic
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنْ أَبِي عُبَيْدٍ، مَوْلَى ابْنِ أَزْهَرَ عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " يُسْتَجَابُ لأَحَدِكُمْ مَا لَمْ يَعْجَلْ يَقُولُ دَعَوْتُ فَلَمْ يُسْتَجَبْ لِي ".
English translation
Narrated Abu Huraira:Allah's Messenger (ﷺ) said, "The invocation of anyone of you is granted (by Allah) if he does not show impatience (by saying, "I invoked Allah but my request has not been granted)
Reference: Sahih al-Bukhari 6340, Book of Invocations. English translation by Dr. Muhammad Muhsin Khan.