Abu Huraira reported that al-Aqra' b. Habis saw Allah's Apostle (ﷺ) kissing Hasan. He said:I have ten children, but I have never kissed any one of them, whereupon Allah's Messenger (ﷺ) said: He who does not show mercy (towards his children), no mercy would be shown to him

English translation · Sahih Muslim