When a person sheds the blood of a fellow human being, it is as if he is shedding his own blood. And when a person who kills another soul, it is as if he has killed the whole of Mankind, as Allah U says:
﴾مَنْ قَتَلَ نَفْساً بِغَيْرِ نَفْسٍ أَوْ فَسَادٍ فِي الأَرْضِ فَكَأَنَّمَا قَتَلَ النَّاسَ جَمِيعاً﴿
“If anyone slew a person – unless it be for murder or for spreading mischief in the land – it would be as if he slew all of mankind” [Surah Al-Ma’idah: 32].
﴾وَلا تُخْرِجُونَ أَنفُسَكُمْ﴿ “evict one another”: The word ‘Anfusakum’ here means ‘yourselves’. However, in this verse, it refers to ‘other than yourselves’. Therefore, this establishes the brotherhood in humanity. Verily, the believers are brothers, and this is the brotherhood in religion. Brotherhood in humanity is another type of brotherhood, as Sayyidina Ali t said, “Human beings are of two groups: Either your brother in religion, or your counterpart in creation…”
﴾وَلا تُخْرِجُونَ أَنفُسَكُمْ مِنْ دِيَارِكُمْ ﴿ “or evict one another from your homes”: The word Anfusakum is used here to establish the brotherhood in humanity. They had acknowledged this covenant when the Prophet Musa u brought with him twelve leaders from among the Israelites to witness it.