Nu'aym al-Mujmir (may Allah have mercy on him) relates: I heard Marwan (may Allah have mercy on him) saying to Sayyiduna Abu Hurayrah (may Allah be pleased with him): "By Allah, I would certainly love you, were it not that you love Sayyiduna al-Hasan bin Ali (may Allah be pleased with them both)." At this Sayyiduna Abu Hurayrah (may Allah be pleased with him) said to Marwan: "And what is wrong with me that I should not love him, when I saw the Messenger of Allah (peace and blessings be upon him) one day come to their door and call out: 'O Hasan!' So Sayyiduna al-Hasan (may Allah be pleased with him) came out to him (peace and blessings be upon him). Then he (peace and blessings be upon him) put his blessed mouth to his mouth, sucked his tongue and hugged him to his blessed chest. So, by Allah, I will never stop loving him."
No one narrated this hadith from Umarah bin Ghaziyyah (may Allah have mercy on him) except Yahya bin Ayyub (may Allah have mercy on him), and no one from Yahya (may Allah have mercy on him) except Ishaq bin al-Furat (may Allah have mercy on him), while Ahmad bin Sa'id al-Hamdani (may Allah have mercy on him) is alone in narrating it.