Narrated by hazrat Zaid bin Arqum رضی اللہ عنہا, Prophet ﷺ said to Hazrat Ali رضی اللہ عنہا, Hazrat Fatimah رضی اللہ عنہا, Hazrat Hassan and Hussanin رضی اللہ عنہا: who so ever you will fight with I will fight with him and who so ever you will settle down I will settle down with him too. (Meaning, your enemy will be mine enemy and your friend will be mine friend) (Tirmadi, Ibne Maja)
Hazrat Osama bin Zaid رضی اللہ عنہا Narrated that: one night I went to Prophet ﷺ for some matter HE ﷺ came out and you ﷺ was sticking something with yourself ﷺ which I was unable to find out, later after finishing my work I asked: O Prophet ﷺ what have you ﷺ stick with yourself ﷺ? HE ﷺ removed cloth and there were Hazrat Hassan and Hussain رضوان اللہ اجمعین . said: these are my sons. O ALLAH! I love them you also love them also love him who love them. (Tirmadi, Ibne Habban, Imam Tirmadi said that this Hadith is beauty)
Hazrat Abu Hurraira رضی اللہ عنہا narrated that He ﷺ was giving us lecture and Hazrat Hussain رضی اللہ عنہا came, he was wearing red shirt (due to his younger age) and He was not walking properly. HE ﷺ (saw him) came down from his seat, picked both of them (prince) and made them sit in front of Him ﷺ , then said: How true is ALLAH’s saying: ”no doubt your acts and your children are your tests” I saw them walking not properly I stopped my talk and picked them. (Tirmadi, Nisai)
Hazrat Ume Salma ﷺ said that I heard Prophet ﷺ saying that ALI and Quran are both together. They will never depart from each other and even they will come together to me on HOZ E QOSAR. (Imam Tibrani)