حَدَّثَنِي مَالِكٌ، عَنْ هِلاَلِ بْنِ أُسَامَةَ، عَنْ عَطَاءِ بْنِ يَسَارٍ، عَنْ عُمَرَ بْنِ الْحَكَمِ، أَنَّهُ قَالَ أَتَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم فَقُلْتُ يَا رَسُولَ اللَّهِ إِنَّ جَارِيَةً لِي كَانَتْ تَرْعَى غَنَمًا لِي فَجِئْتُهَا وَقَدْ فُقِدَتْ شَاةٌ مِنَ الْغَنَمِ فَسَأَلْتُهَا عَنْهَا فَقَالَتْ أَكَلَهَا الذِّئْبُ فَأَسِفْتُ عَلَيْهَا وَكُنْتُ مِنْ بَنِي آدَمَ فَلَطَمْتُ وَجْهَهَا وَعَلَىَّ رَقَبَةٌ أَفَأُعْتِقُهَا فَقَالَ لَهَا رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ أَيْنَ اللَّهُ ‏"‏ ‏.‏ فَقَالَتْ فِي السَّمَاءِ ‏.‏ فَقَالَ ‏"‏ مَنْ أَنَا ‏"‏ ‏.‏ فَقَالَتْ أَنْتَ رَسُولُ اللَّهِ ‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ أَعْتِقْهَا ‏"‏ ‏.‏

Malik related to me from Hilal ibn Usama from Ata ibn Yasar thatUmar ibn al-Hakam said, "I went to the Messenger of Allah, may Allahbless him and grant him peace, and said, 'Messenger of Allah, a slavegirl of mine was tending my sheep. I came to her and one of the sheepwas lost. I asked her about it and she said that a wolf had eaten it,so I became angry and I am one of the children of Adam, so I struckher on the face. As it happens, I have to set a slave free, shall Ifree her?' The Messenger of Allah, may Allah bless him and grant himpeace, questioned her, 'Where is Allah?' She said, 'In heaven.' Hesaid, 'Who am I?' She said, 'You are the Messenger of Allah.' TheMessenger of Allah, may Allah bless him and grant him peace, said,'Free her.' " Translation Not Available

Book Ref: Muwatta Imam Malik Book 38 Hadith 1473
Web Ref:  Muwatta Imam Malik Book 38 Hadith 8