He who strokes the head of a boy with his father and invokes blessings on him

Ubadah bin Walid said that he came out with his father Ubadah bin al-Samit and he was a young man at that time. They met an elderly Shaikh who had a mantle over him and Maafi garments. His slave too had a mantle and Maafai. The narrator (Ubadah bin Walid) said," My uncle! In this way, you would have had a pair of good quality garments and he would have had one striped mantle". The man turned to Ubadah bin al-Samit and asked," Is he your son?" He said," yes" Ubadah bin Walid said that the Shaikh stroked his head and said," May Allah bless you! I bear testimony that I heard the Messenger of Allah (ﷺ) say that we must feed the slaves the same thing that we eat and clothe them that which we wear. O son of my brother! It is more dear to me that I lose the possessions of this world than I lose anything of the hereafter". Ubadah bin Walid asked his father who the Shaikh was and he said." He is Abu al-Yasr Kab bin Amr"

حَدَّثَنَا إِسْحَاقُ، قَالَ: أَخْبَرَنَا حَنْظَلَةُ بْنُ عَمْرٍو الزُّرَقِيُّ الْمَدَنِيُّ قَالَ: حَدَّثَنِي أَبُو حَزْرَةَ قَالَ: أَخْبَرَنِي عُبَادَةُ بْنُ الْوَلِيدِ بْنِ عُبَادَةَ بْنِ الصَّامِتِ قَالَ: خَرَجْتُ مَعَ أَبِي وَأَنَا غُلاَمٌ شَابٌّ، فَنَلْقَى شَيْخًا، قُلْتُ: أَيْ عَمِّ، مَا مَنَعَكَ أَنْ تُعْطِيَ غُلاَمَكَ هَذِهِ النَّمِرَةَ، وَتَأْخُذَ الْبُرْدَةَ، فَتَكُونُ عَلَيْكَ بُرْدَتَانِ، وَعَلَيْهِ نَمِرَةٌ؟ فَأَقْبَلَ عَلَى أَبِي فَقَالَ: ابْنُكَ هَذَا؟ قَالَ: نَعَمْ، قَالَ: فَمَسَحَ عَلَى رَأْسِي وَقَالَ: بَارَكَ اللَّهُ فِيكَ، أَشْهَدُ لَسَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ: أَطْعِمُوهُمْ مِمَّا تَأْكُلُونَ، وَاكْسُوهُمْ مِمَّا تَكْتَسُونَ، يَا ابْنَ أَخِي، ذَهَابُ مَتَاعِ الدُّنْيَا أَحَبُّ إِلَيَّ مِنْ أَنْ يَأْخُذَ مِنْ مَتَاعِ الْآخِرَةِ، قُلْتُ: أَيْ أَبَتَاهُ، مَنْ هَذَا الرَّجُلُ؟ قَالَ: أَبُو الْيَسَر كَعْبِ بْنُ عَمْرٍو.