Jami` at-Tirmidhi Book 27, Hadith 17
"Al-Aqra' bin Habis saw the prophet kissing Al-Hasan"- Ibn Abi 'Umar (one of the narrators) said:"Al-Hasan and Al-Husain." So he said: 'I have ten children and I do not kiss any one of them.' So the Messenger of Allah said: 'Whoever shows no mercy, he will be shown no mercy."
'a righteous woman, Khawlah bint Hakim said: "The Messenger of Allah came out during the middle of the day, while holding one of the sons of his daughter in his arms. He was saying: 'You are what makes them stingy, cowardly and ignorant. And you are but Raihanillah
the Messenger of Allah said: "There is no one who has three daughters, or three sisters, and he treats them well, except that he enters paradise."