“Foster brotherhood and love amongst yourselves; forsake barbarity and mutual dissension. Withdraw completely from all forms of jest and mockery, for mockery moves the heart far away from the truth. Treat one another with respect. Each and every one of you ought to give preference to the comfort of your brother over themselves. Reconcile sincerely with Allah the Exalted and become subservient to Him once again. […] Rid yourself of all mutual conflict, aggression and enmity. Now is the time for you to set aside trivial matters and engage yourself in important and magnificent work.”
(Malfuzat [English], Vol. 1, pp. 267-268)