لَا يَدْخُلُ الْجَنَّةَ مَنْ لَا يَأْمَنُ جَارُهُ بَوَائِقَهُ
A severe warning against entering Paradise is given for one whose neighbor is not safe from their harmful acts.
Source: مسلم
جَارُهُ means “his neighbor,” and بَوَائِقَهُ means “his harmful actions or sources of harm.” بَوَائِق is the plural of بَائِقَة. A neighbor should be safe from another person’s words, behavior, and actions.
In مَنْ لَا يَأْمَنُ جَارُهُ بَوَائِقَهُ, مَنْ means “the person whose…,” يَأْمَنُ is the verb, and جَارُهُ is its subject. The grammar makes clear that the neighbor is the one who should experience safety.