Reward for forbearance
The Prophet (sal Allahu alaihi wa sallam) said, “Allah is Forbearer and He loves forbearance, and rewards for forbearance while He does not reward severity, and does not give for anything besides it (forbearance).”
Forbearance (Mildness) is the opposite of harshness. Allah enjoins softness and dislikes stiffness in human relations. Allah assures of reward for gentle behavior in society, not for unkindness or anything like that. However, inflexibility is preferred to flexibility when there arises a question of religious matters and the limits set by Allah.
And Allah knows best!