There is no harm and no reciprocating of harm.
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The first question of Fatwa No. ( 9770 ):
Q1: Whatis the meaning of the saying of the Messenger (peace and blessings be upon him):Sunan Ibn Majah 2340Da'if (Darussalam) ؟ I want an explanation of this hadith and what can be derived from it.
A1: The Prophet (peace and blessings be upon him) forbade the accountable person from harming himself or harming others. This indicates that a person is prohibited from transgressing against himself or others. Although there is some discussion regarding this hadith, it has been transmitted through various chains that reinforce one another, and it has corroborating narrations. Therefore, it reaches the level of hasan li-ghayrihi (good due to external support) and is suitable for use as evidence. I advise you to review the book [Jami' al-'Ulum wa al-Hikam] by al-Hafiz Ibn Rajab for an explanation of this hadith. And success is from Allah. May Allah send prayers and blessings upon our Prophet Muhammad, his family, and his Companions.
Q1: Whatis the meaning of the saying of the Messenger (peace and blessings be upon him):
It was narrated from 'Ubadah bin Samit that the Messenger of Allah (ﷺ) ruled: “There should be neither harming nor reciprocating harm.”
لا ضرر ولا ضرارA1: The Prophet (peace and blessings be upon him) forbade the accountable person from harming himself or harming others. This indicates that a person is prohibited from transgressing against himself or others. Although there is some discussion regarding this hadith, it has been transmitted through various chains that reinforce one another, and it has corroborating narrations. Therefore, it reaches the level of hasan li-ghayrihi (good due to external support) and is suitable for use as evidence. I advise you to review the book [Jami' al-'Ulum wa al-Hikam] by al-Hafiz Ibn Rajab for an explanation of this hadith. And success is from Allah. May Allah send prayers and blessings upon our Prophet Muhammad, his family, and his Companions.
Source
www.alifta.gov.sa
The Arabic text is copied verbatim from the original source, without any edits.