question #2 Sahih al-Bukhari 5998, Book 78, Hadith 29 : How does the absence of mercy in one’s heart affect their behavior towards others?

A bedouin came to the Prophet (ﷺ) and said, “You (people) kiss the boys! We don’t kiss them.” The
Prophet said, “I cannot put mercy in your heart after Allah has taken it away from it.”