Allah The Exalted says:Muhammad (SAW) is the Messenger of Allah and those who are with him are severe against disbelievers, and merciful among themselves.

Allah The Exalted says:And recommend one another to perseverance and patience, and (also) recommended one another to pity and compassion.
 

Abu Huraira (RA) narrated: It was said O Allah's Messenger (SAW) Invoke (curse) upon the polytheist, whereupon he (SAW) said," I have not been sent as the invoker of curse, but I have been sent as mercy."
 

Jarir bin Abdullah(RA)narrated : Allah's Messenger ö said, "Allah does not show mercy to the one who is not merciful to people."
 

Abdullah bin Amr (RA)narrated from The Prophet (SAW) : "The Merciful is merciful to those who show mercy. Have mercy for those who are on the earth, the one in the heavens will show mercy to you."

Aisha (RA)narrated : A bedouin came to The Prophet (SAW)and said: You kiss the children! we don't kiss them. The Prophet ö said, "How can I (help) you in this (matter) if Allah has taken mercy away from your heart."

Abu Huraira (RA) narrated : I heard Abu Al - Qasim (SAW) say, "Mercy is not taken away except from the wretched ."

Anas bin Malik (RA) narrated: I never offered prayers behind any Imam a prayer lighter and more perfect than that behind The Prophet (SAW) and when ever he heard cries of the child he used to shorten it fearing that he might put his mother in trial.