In The Name of Allah, The Most Merciful, The Bestower of Mercy.

Khalid Bin Hayyan narrated from Jafar Bin Burqan, may Allah have mercy upon them, who said: Maymoon Bin Mihran, may Allah have mercy upon him said to me:

“O Jafar! Say what I detest (i.e. the bitter truth) in my face since a man will not have (fulfilled) advice to his brother until he says in his face what he detests”. [1]

Umar Ibn Abdul Azeez, may Allah have mercy upon him, said:

“Whoever advises his brother to rectify affairs related to his religion and gives him insight into a worldly affair has perfected their relationship and fulfilled his obligation of (brotherhood) to him”. [2]

[1] [Siyar A’lam An-Nubulaa. 5/75]

[2] Tarikh at-Tabari 6/572]