مُوَطَّأُ مَالِكٍ
Muwatta Malik 501
The Qur'an
وَحَدَّثَنِي عَنْ مَالِكٍ، 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 فَيَقُولُ قَدْ دَعَوْتُ فَلَمْ يُسْتَجَبْ لِي .
Yahya related to me from Malik from Ibn Shihab from Abu Ubayd, the mawla of Ibn Azhar, from Abu Hurayra that the Messenger of Allah, (ﷺ), said, "You will be answered as long as you are not impatient and say, 'I have made a dua and I have not been answered .' "
Arabic/English book reference: Book 15, Hadith 29