Narrated Abu Huraira: Allah's Apostle kissed Al-Hasan bin `Ali while Al-Aqra' bin H`Abis at-Tamim was sitting beside him. Al-Aqra said, I have ten children and I have never kissed anyone of them, Allah's Apostle cast a look at him and said, Whoever is not merciful to others will not be treated mercifully.