'A'isha said, "A bedouin came to the Prophet ﷺ and asked, "Do you kiss your children? We do not kiss them.' The Prophet ﷺ said, 'Can I put mercy in your hearts after Allah has removed it from them?'"

جَاءَ أَعْرَابِيٌّ إِلَى النَّبِيِّ ﷺ فَقَالَ أَتُقَبِّلُونَ صِبْيَانَكُمْ؟ فَمَا نُقَبِّلُهُمْ فَقَالَ النَّبِيُّ ﷺ أَوَ أَمْلِكُ لَكَ أَنْ نَزَعَ اللَّهُ مِنْ قَلْبِكَ الرَّحْمَةَ؟

Abu Hurayra said, "The Messenger of Allah ﷺ kissed Hasan ibn 'Ali while al-Aqra' ibn Habis at-Tamimi was sitting with him. Al-Aqra' observed, 'I have ten children and I have never kissed any of them.' The Messenger of Allah ﷺ looked at him and said, 'Whoever does not show mercy will not be shown mercy.'"

قَبَّلَ رَسُولُ اللهِ ﷺ حَسَنَ بْنَ عَلِيٍّ وَعِنْدَهُ الأَقْرَعُ بْنُ حَابِسٍ التَّمِيمِيُّ جَالِسٌ فَقَالَ الأَقْرَعُ إِنَّ لِي عَشَرَةً مِنَ الْوَلَدِ مَا قَبَّلْتُ مِنْهُمْ أَحَدًا فَنَظَرَ إِلَيْهِ رَسُولُ اللهِ ﷺ ثُمَّ قَالَ مَنْ لا يَرْحَمُ لا يُرْحَمُ