Narrated Abu Huraira:

When I came to the Prophet ﷺ said on my way, "O what a long tedious tiresome night;
nevertheless, it has rescued me from the place of Heathenism." A slave of mine ran away on the way. When I reached the Prophet I gave him the oath of allegiance (for Islam), and while I was sitting with him, suddenly the slave appeared. The Prophet ﷺ said to me. "O Abu Huraira! Here is your slave," I said, "He (i.e. the slave) is (free) for Allah's Sake," and manumitted him.

حَدَّثَنِي مُحَمَّدُ بْنُ الْعَلاَءِ، حَدَّثَنَا أَبُو أُسَامَةَ، حَدَّثَنَا إِسْمَاعِيلُ، عَنْ قَيْسٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ لَمَّا قَدِمْتُ عَلَى النَّبِيِّ ﷺ قُلْتُ فِي الطَّرِيقِ: يَا لَيْلَةً مِنْ طُولِهَا وَعَنَائِهَا     عَلَى أَنَّهَا مِنْ دَارَةِ الْكُفْرِ نَجَّتِ

وَأَبَقَ غُلاَمٌ لِي فِي الطَّرِيقِ، فَلَمَّا قَدِمْتُ عَلَى النَّبِيِّ ﷺ فَبَايَعْتُهُ، فَبَيْنَا أَنَا عِنْدَهُ إِذْ طَلَعَ الْغُلاَمُ، فَقَالَ لِي النَّبِيُّ ﷺ " يَا أَبَا هُرَيْرَةَ هَذَا غُلاَمُكَ ". فَقُلْتُ هُوَ لِوَجْهِ اللَّهِ تَعَالَى. فَأَعْتَقْتُهُ.