It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him), he said that the Messenger of Allah (peace and blessings of Allah be upon him) kissed Sayyiduna Hasan bin Ali (may Allah be pleased with them both). At that time, Aqra’ bin Habis Tamimi was sitting with the Prophet (peace be upon him). Aqra’ said:“I have ten sons and I have not kissed any of them.”Upon this, the Messenger (peace be upon him) looked towards him and said:“He who does not show mercy will not be shown mercy.”