Hadith No: 2
Al-Hakim al-Nisaburi - Al-Mustadrak 'ala al-Sahihayn
Book of Knowledge of the Companions (r) - O Ali, you are a master in this world, a master in the Hereafter
Volume: (3) - Page Number: (122)
4696 - Abu al-Abbas Muhammad ibn Ya'qub narrated to us, saying: Ibrahim ibn Sulayman al-Barunsi narrated to us, saying: Muhammad ibn Isma'il narrated to us, saying: Yahya ibn Iya narrated to us, saying: Bassam al-Sayrafi narrated to us, from Hasan ibn Amr al-Fuqimi, from Mu'awiya ibn Thalaba
from Abu Dharr (r) who said: The Messenger of Allah (s.a.w.a.) said to Ali ibn Abi Talib (r): "Whoever obeys me has obeyed Allah, and whoever disobeys me has disobeyed Allah. Whoever obeys you has obeyed me, and whoever disobeys you has disobeyed me." This is a hadith with a sound chain of narrators, and they did not include it in their compilations.