Basically, at the next time you do hit with a melee weapon attack at the time of this 5e spell’s duration and also your attack deals an extra 1d6 psychic damage. In an addition, if the target was a creature, then it should make a wisdom saving throw or else it should be frightened of you until end of the spell.
So, like an action, the creature can able to make a wisdom check against your spell save DC for steeling its resolve and also end this spell.
Attributes Of Wrathful Smite 5E Spell
|Casting Time||1 bonus action|
|Duration||Concentration, up to 1 minute|