How can severity be part of wisdom in actions without involving cursing, scolding, or quarreling, and what is an example of that?

Wisdom is placing something in its proper place, not an intermediate position between gentleness and severity. Gentleness is not wisdom if the benefit necessitates severity, and vice versa. Wise severity does not mean insult or quarrel, but rather a type of firmness and upbringing devoid of hurtful remarks, such as the boycott practiced by the Messenger of Allah (peace and blessings be upon him) with the three who lagged behind in the Battle of Tabuk, or depriving children of some pleasures as a form of discipline.