Allah's Messenger kissed Al-Hasan ibn Ali while Al-Aqra ibn Habis At-Tamim was sitting with him. Al-Aqra said, "I have ten children and have never kissed one of them." The Prophet cast a look at him and said, "Whoever is not merciful to others will not be treated mercifully."
Al-Bukhari [citation needed] - Sunni Hadith