Anas ibn Malik reported: The Messenger of Allah, peace and blessings be upon him, said, “The servant will continue to be upon goodness as long as he is not impatient.” They said, “O Messenger of Allah, how is he impatient?” The Prophet said, “He says: I have supplicated to my Lord and He did not answer me.”
Source: Musnad Aḥmad 13008
Grade: Sahih li ghayrihi (authentic due to external evidence) according to Al-Arna’ut
عَنْ أَنَسٍ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَا يَزَالُ الْعَبْدُ بِخَيْرٍ مَا لَمْ يَسْتَعْجِلْ قَالُوا يَا رَسُولَ اللَّهِ كَيْفَ يَسْتَعْجِلُ قَالَ يَقُولُ دَعَوْتُ رَبِّي فَلَمْ يَسْتَجِبْ لِي
13008 مسند أحمد
20/311 المحدث شعيب الأرناؤوط خلاصة حكم المحدث صحيح لغيره في تخريج المسند