عَنْ عَمْرِو بْنِ عَبَسَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ مَنْ كَانَ بَيْنَهُ وَبَيْنَ قَوْمٍ عَهْدٌ فَلَا يَشُدُّ عُقْدَةً وَلَا يَحُلُّ حَتَّى يَمْضِيَ أَمَدُهَا أَوْ يَنْبِذَ إِلَيْهِمْ عَلَى سَوَاءٍ
It is narrated from Sayyiduna Amr bin Abasah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: When a Muslim nation has a treaty with another nation, it should neither extend and strengthen it further nor break it, until its term expires or both parties mutually annul it equally.