Hadith: By Allah, he does not believe. By Allah, he does not believe. By Allah, he does not believe." It was said: Who, O Messenger of Allah? He said: "The one whose neighbor is not safe from his evils

عَنْ أَبِي شُرَيْحٍ رضي الله عنه أَنَّ النَّبِيَّ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ قَالَ:
«وَاللَّهِ لاَ يُؤْمِنُ، وَاللَّهِ لاَ يُؤْمِنُ، وَاللَّهِ لاَ يُؤْمِنُ»، قِيلَ: وَمَنْ يَا رَسُولَ اللَّهِ؟ قَالَ: «الَّذِي لاَ يَأْمَنُ جَارُهُ بَوَايِقَهُ».
[صحيح] - [رواه البخاري] - [صحيح البخاري: 6016]

Abu Shurayh (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said:
"By Allah, he does not believe. By Allah, he does not believe. By Allah, he does not believe." It was said: Who, O Messenger of Allah? He said: "The one whose neighbor is not safe from his evils."
[Authentic hadith] - [Narrated by Bukhari] - [Sahih Bukhari - 6016]

Explanation

The Prophet (may Allah's peace and blessings be upon him) swore and confirmed his oath three times, saying: By Allah, he does not believe. By Allah, he does not believe. By Allah, he does not believe. The Companions asked him: Who does not believe, O Messenger of Allah? He replied: The one whose neighbor fears his treachery, oppression, and evil.