Sayyiduna Uthman al-Ghani (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "After me you will be put to trial, so do not fight under any circumstances."
Abu Ya'la recorded it in al-Kabir from his teacher, whose lineage is not stated, and I do not know him; the remaining narrators of this report are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الفتن - أعاذنا الله منها / 11990