حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا عُثْمَانُ بْنُ عُمَرَ، حَدَّثَنَا شُعْبَةُ، عَنْ ثَابِتٍ، عَنْ أَنَسٍ، قَالَ أَتَى نَبِيُّ اللَّهِ صلى الله عليه وسلم عَلَى امْرَأَةٍ تَبْكِي عَلَى صَبِيٍّ لَهَا فَقَالَ لَهَا ‏"‏ اتَّقِي اللَّهَ وَاصْبِرِي ‏"‏ ‏.‏ فَقَالَتْ وَمَا تُبَالِي أَنْتَ بِمُصِيبَتِي فَقِيلَ لَهَا هَذَا النَّبِيُّ صلى الله عليه وسلم ‏.‏ فَأَتَتْهُ فَلَمْ تَجِدْ عَلَى بَابِهِ بَوَّابِينَ فَقَالَتْ يَا رَسُولَ اللَّهِ لَمْ أَعْرِفْكَ فَقَالَ ‏"‏ إِنَّمَا الصَّبْرُ عِنْدَ الصَّدْمَةِ الأُولَى ‏"‏ ‏.‏ أَوْ ‏"‏ عِنْدَ أَوَّلِ صَدْمَةٍ ‏"‏ ‏.‏

Narrated Anas: The Prophet (PBUH) came upon a woman who was weeping for her child. He said to her: Fear Allah and have patience. She said: What have you to do with my calamity ? She was then told that he was the Prophet (PBUH). She, therefore, came to him. She did not find doorkeepers at his gate. She said: I did not recognize you, Messenger of Allah. He said: Endurance is shown only at a first blow. Translation Not Available

Book Ref: Sunan Abi Dawud Book 21 Hadith 3124
Web Ref:  Sunan Abi Dawud Book 20 Hadith 3118