«وَمَنْ كَانَ بَيْنَهُ وَبَيْنَ قَوْمٍ عَهْدٌ فَلَا يَحُلَّنَّ عُقْدَةً وَلَا يَشُدَّهَا حَتَّى يَنْقَضِي أَمَدُهَا، أَوْ يَنْبُذَ إِلَيْهِمْ عَلَى سَوَاء»
(Whoever has a treaty of peace with a people, then he should not untie any part of it or tie it harder until the treaty reaches its appointed term. Or, he should declare the treaty null and void so that they are both on equal terms.) When Mu`awiyah was informed of the Prophet's statement, he retreated. They found that man to be `Amr bin `Anbasah, may Allah be pleased with him.'' This Hadith was also collected by Abu Dawud At-Tayalisi, Abu Dawud, At-Tirmidhi, An-Nasa'i and Ibn Hibban in his Sahih. At-Tirmidhi said, â€Hasan Sahih.''