Musnad AhmadChapter 4Hadith 512
Full Sharh — Musnad Ahmad 512
حَدَّثَنَا إِبْرَاهِيمُ بْنُ خَالِدٍ الصَّنْعَانِيُّ، حَدَّثَنِي أُمَيَّةُ بْنُ شِبْلٍ، وَغَيْرُهُ، قَالُوا وَلِيَ عُثْمَانُ ثِنْتَيْ عَشْرَةَ وَكَانَتْ الْفِتْنَةُ خَمْسَ سِنِينَ.
English Translation
Umayyah bin Shibl and others said:: `Uthman held the position of caliph for twelve years and the turmoil lasted for five years.
Source
Musnad Ahmad(مسند أحمد)
Musnad Uthman ibn Affan
Hadith Number
512