A man brought the Prophet ﷺ a black slave girl. He said: Messenger of Allah, emancipation of believing slave is due to me. He asked her: Where is Allah ? She pointed to the heaven with her finger. He then asked her: Who am I ? She pointed to the Prophet ﷺ and to the heaven, that is to say: You are the Messenger of Allah. He then said: Set her free, she is a believer. (Using translation from Abū Dāʾūd 3284)   

أَنَّ رَجُلًا أَتَى النَّبِيَّ ﷺ بِجَارِيَةٍ سَوْدَاءَ فَقَالَ يَا رَسُولَ اللهِ إِنَّ عَلَيَّ عِتْقَ رَقَبَةٍ مُؤْمِنَةٍ فَقَالَ لَهَا أَيْنَ اللهُ؟ فَأَشَارَتْ إِلَى السَّمَاءِ بِإِصْبَعِهَا فَقَالَ لَهَا فَمَنْ أَنَا؟ فَأَشَارَتْ إِلَى النَّبِيِّ ﷺ وَإِلَى السَّمَاءِ تَعْنِي أَنْتَ رَسُولُ اللهِ فَقَالَ رَسُولُ اللهِ ﷺ أَعْتِقْهَا فَإِنَّهَا مُؤْمِنَةٌ  

[Machine] A woman came to the Messenger of Allah ﷺ with a black slave woman and said, "O Messenger of Allah, I have a believing slave woman. Should I free her?" The Messenger of Allah ﷺ asked her, "Who is your Lord?" She replied, "Allah is my Lord." He asked her, "What is your religion?" She said, "Islam." He asked her, "Who am I?" She replied, "You are the Messenger of Allah." Then he said to her, "So pray the five daily prayers and believe in what I have brought from Allah." She said, "Yes." Then he slapped her on the back and said, "Free her."  

جَاءَتِ امْرَأَةٌ إِلَى رَسُولِ اللهِ ﷺ بِأَمَةٍ سَوْدَاءَ فَقَالَتْ يَا رَسُولَ اللهِ إِنَّ عَلَيَّ رَقَبَةً مُؤْمِنَةً أَفَتُجْزِئُ عَنِّي هَذِهِ؟ فَقَالَ رَسُولُ اللهِ ﷺ مَنْ رَبُّكِ؟ قَالَتْ اللهُ رَبِّي قَالَ فَمَا دِينُكِ؟ قَالَتْ الْإِسْلَامُ قَالَ فَمَنْ أَنَا؟ قَالَتْ أَنْتَ رَسُولُ اللهِ قَالَ فَتُصَلِّينَ الْخَمْسَ وَتُقِرِّينَ بِمَا جِئْتُ بِهِ مِنْ عِنْدِ اللهِ؟ قَالَتْ نَعَمْ فَضَرَبَ ﷺ عَلَى ظَهْرِهَا وقَالَ أَعْتِقِيهَا