Hadith on Salaf: The best generations are the Companions and the Righteous Predecessors (Salaf As-Salih)

Narrated Abdullah: The Prophet, peace be upon him, said, “The best people are those of my generation, then those who come after them, then those who come after them. And then after them will come people whose witness will precede their oaths, and whose oaths will precede their witness (i.e. they are treacherous).”

[Sahih Bukhari, Book 76, Number 437]

عَنْ عَبْدِ اللَّهِ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏”‏ خَيْرُ النَّاسِ قَرْنِي، ثُمَّ الَّذِينَ يَلُونَهُمْ، ثُمَّ الَّذِينَ يَلُونَهُمْ، ثُمَّ يَجِيءُ مِنْ بَعْدِهِمْ قَوْمٌ تَسْبِقُ شَهَادَتُهُمْ أَيْمَانَهُمْ وَأَيْمَانُهُمْ شَهَادَتَهُمْ ‏”‏‏

Hadith on Covenants: Whoever breaks his peace treaty will not enter Paradise

Abu Bakrah رضى الله عنه reported: The Messenger of Allah صلى الله عليه وسلم said, “Whoever kills a person protected by a covenant, before its term expires, Allah has made Paradise forbidden for him.”

[Sunan Abu Dawud, Book 15, Number 2760, Grade: Sahih]

Book of Jihad, Chapter: On fulfilling the Covenant and the Sanctity of its Protection

عَنْ أَبِي بَكْرَةَ قَالَ  قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَنْ قَتَلَ مُعَاهِدًا فِي غَيْرِ كُنْهِهِ حَرَّمَ اللَّهُ عَلَيْهِ الْجَنَّةَ

كتاب الجهاد » باب في الوفاء للمعاهد وحرمة ذمته