From Jundub (radiyallaahu 'anhu) who said that the Messenger of Allaah (salallaahu 'alaihi wa'sallam) narrated:
That a man said: By Allaah, Allaah will not forgive so and so. Whereas Allaah, the Most High said: Who is it who swears by Me that I will not forgive so and so, for I have forgiven so and so, and have rendered your actions futile.
[Author's text abridged hereafter]
The fear and hope that a Muslim has for his brothers does not prevent him from carrying out what Allaah has established with regard to: