Sahih Muslim 6028
صحيح مسلم#6028SahihAbu 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 43:86