ستکَونُ بَعدی فِتنَةٌ فَاِذا کانَ کذلِکَ فَالْزِموا علیَّ بْنَ اَبیطالب.
The Prophet of Islam (saw) sates: Soon after me, there will be a sedition and a hard test during which you must only follow Ali ibn Abi Talib and hold fast to him.
Asad alghabeh, Vol.5, p. 287
source : erfan.ir