"Abu Hurayra said, "The Prophet, may Allah bless him and grant him peace, kissed al-Hasan ibn 'Ali while al-Aqra' ibn Habis was with him. Al-Aqra' said, 'I have ten children and have never kissed any of them.' The Messenger of Allah, may Allah bless him and grant him peace, looked at him and said, 'Anyone who does not show mercy will not be shown mercy.""