It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that a man came to him and asked him about this verse: "And fight them until there is no fitnah (trial)." Sayyiduna Ibn Umar (may Allah be pleased with them both) said: "We fought alongside the Prophet (peace and blessings be upon him) until no fitnah remained; now you and your companions go and fight until fitnah (breaks out)."
No one narrated this hadith from Maymun bin Mihran (may Allah have mercy on him) except Abu al-Malih (may Allah have mercy on him).
Hadith Referenceالمعجم الأوسط / باب الألف / 419
Hadith Takhrij«أخرجه البخاري فى «صحيحه» برقم: 4515، 4650، 4651، 7095، والنسائي فى «السنن الكبرى» برقم: 10959، 11143، وسعيد بن منصور فى «سننه» برقم: 284، والبيهقي فى «السنن الكبرى» برقم: 16906، 16907، 16908، وأحمد فى «مسنده» برقم: 5481، 5794، والطبراني فى «الكبير» برقم: 13046، 14143»