Musnad Ahmad 36675

Arabic

حَدَّثَنَا إِبْرَاهِيمُ بْنُ خَالِدٍ الصَّنْعَانِيُّ، حَدَّثَنِي أُمَيَّةُ بْنُ شِبْلٍ، وَغَيْرُهُ، قَالُوا وَلِيَ عُثْمَانُ ثِنْتَيْ عَشْرَةَ وَكَانَتْ الْفِتْنَةُ خَمْسَ سِنِينَ‏.‏

Translation

Narrated by Umayyah bin Shibl and others said:

`Uthman held the position of caliph for twelve years and the turmoil lasted for five years.

Reference