Hadith 30:3
Hushaym informed us, from al-Zuhri, from Abu Salamah, from Abu Hurayrah, who said: Uyaynah ibn Hisn entered upon the Messenger of Allah, may Allah bless him and grant him peace, and saw him kissing al-Hasan or al-Husayn. He said to him: "Do you kiss him, O Messenger of Allah? I have had ten children born to me, and I have not kissed any one of them." The Messenger of Allah, may Allah bless him and grant him peace, said: "Indeed, whoever does not show mercy, will not be shown mercy."
أخبرنا هشيم، عن الزهري، عن أبي سلمة، عن أبي هريرة، قال: دخل عيينة بن حصن على رسول الله صلى الله عليه وسلم، فرآه يقبل حسنا أو حسينا، فقال له: تقبله يا رسول الله؟ لقد ولد لي عشرة، ما قبلت أحدا منهم، فقال رسول الله صلى الله عليه وسلم: " إن من لا يرحم، لا يرحم "