Narrated Jarir bin `Abdullah: Allah's Apostle said, "Allah will not be merciful to those who are not merciful to mankind."

Narrated Usama bin Zaid: The daughter of the Prophet (p.b.u.h) sent (a messenger) to the Prophet requesting him to come as her child was dying (or was gasping), but the Prophet returned the messenger and told him to convey his greeting to her and say: "Whatever Allah takes is for Him and whatever He gives, is for Him, and everything with Him has a limited fixed term (in this world) and so she should be patient and hope for Allah's reward." She again sent for him, swearing that he should come. The Prophet got up, and so did Sa`d bin 'Ubada, Mu`adh bin Jabal, Ubai bin Ka`b, Zaid bin Thabit and some other men. The child was brought to Allah's Apostle while his breath was disturbed in his chest (the sub-narrator thinks that Usama added:) as if it was a leather water-skin. On that the eyes of the Prophet (p.b.u.h) started shedding tears. Sa`d said, "O Allah's Apostle! What is this?" He replied, "It is mercy which Allah has lodged in the hearts of His slaves, and Allah is merciful only to those of His slaves who are merciful (to others).

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."

Narrated Jarir bin `Abdullah: The Prophet said, "He who is not merciful to others, will not be treated mercifully.

Narrated Usama: A son of one of the daughters of the Prophet was dying, so she sent a person to call the Prophet. He sent (her a message), "What ever Allah takes is for Him, and whatever He gives is for Him, and everything has a limited fixed term (in this world) so she should be patient and hope for Allah's reward." She then sent for him again, swearing that he should come. Allah's Apostle got up, and so did Mu`adh bin Jabal, Ubai bin Ka`b and 'Ubada bin As-Samit. When he entered (the house), they gave the child to Allah's Apostle while its breath was disturbed in his chest. (The sub-narrator said: I think he said, "...as if it was a water skin.") Allah's Apostle started weeping whereupon Sa`d bin 'Ubada said, "Do you weep?" The Prophet said, "Allah is merciful only to those of His slaves who are merciful (to others).