Sayyiduna Nawas bin Sam'an (may Allah be pleased with him) narrates: When Allah granted victory to the Prophet (peace and blessings of Allah be upon him), I came to him and said, "O Messenger of Allah! The horses have been let loose to graze, the weapons have been put down, the war has ended, and people are saying that there will be no more fighting." The Prophet (peace and blessings of Allah be upon him) said, "They are wrong. Now is the time for fighting, now is the time for fighting. Indeed, Allah will turn the hearts of some people crooked, and they will begin to fight those people. Allah will continue to provide sustenance to those people until Allah's command comes to pass, and at that time, the abode of the believers will be in Syria."
Hadith Referenceصحیح ابن حبان / كتاب إخباره ﷺ عن مناقب الصحابة رجالهم ونسائهم بذكر أسمائهم رضوان الله عليهم أجمعين / 7307
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «الصحيحة» (1935).فضيلة الشيخ العلّامة شُعيب الأرناؤوطحديث صحيح