There should be neither harming nor reciprocating harm

Q 1: What is the meaning of the Prophet's saying: "There should be neither harming nor reciprocating harm." ? I would like an explanation for this Hadith and the benefits that can be derived from it.

The Prophet (peace be upon him) forbade the Mukallaf (person meeting the conditions to be held legally accountable for their actions) to cause harm to himself or to others. This Hadith denotes that one is not permitted to transgress against others or against himself. Though there is controversy concerning the authenticity of this Hadith, it is transmitted through chains of narration that support each other. There are other relevant narrations that have the same meaning. These aspects elevate this Hadith to the rank of Hasan Li Ghayrih (A Hadith is judged Good by virtue of another Hadith when its weakness is so slight that it can be raised through another chain to the level of the Good Hadith). Therefore, it can be cited as evidence.We advise you to refer to the book “Jami‘ Al-‘Ulum Wa Al-Hikam” by Al-Hafizh ibn Rajab in his commentary on this Hadith.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.