All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
First of all, we thank you for contacting us.
You should know that this question is very broad and cannot be answered in a Fatwa. Rather, it requires books consisting of many volumes; it is not one or two Ahadeeth, but rather hundreds of Ahadeeth!
For example, Ibn Sa’d reported in his book At-Tabaqaat that Anas ibn Maalik narrated:
“I accompanied the Prophet for ten years [..] If one of his companions met with him, he would stand with him, and he would not go away until it is the man would be the one to depart from him. If one of his companions met him and held his hand, he would not take off his hand until it is the man who would take his hand off. If any of his companions wants to speak to him secretly and puts his mouth next to his ear (to whisper to him), the Prophet would not take away his ear (head) unless it is the man would pull away from him.” [Al-Albaani classified it as Hassan]
The Prophet also used to be friendly with boys. Anas narrated that he was once walking with the Prophet and they passed by young boys and the Prophet greeted them. [Al-Bukhari and Muslim]
Moreover, Sahl ibn Haneef narrated: “The Prophet used to go to the poor Muslims, visit them, visit the ill ones amongst, and attend their funeral processions.” [Al-Haakim who graded it as authentic]
These three Ahaadeeth about the kindness of the Prophet are enough. They are excerpted from a chapter entitled “Khuluq At-Tawaddud” (the conduct of kindness) from Mawsoo’at Al-Akhlaaq (the Encyclopedia of Morals), issued by Ad-Durar As-Saniyyah Foundation.
Allah knows best.