src/Javascript/JavascriptRulesTrait.php
protected function ruleConfirmed($attribute, array $parameters)
    {
        $parameters[0] = $this->getAttributeName($attribute);
        $attribute = "{$attribute}_confirmation";

        return [$attribute, $parameters];
    }
protected function ruleConfirmed($attribute, array $parameters)
    {
        $parameters[0] = $this->getAttributeName($attribute);
        $attribute = "{$attribute}_confirmation";

        return [$attribute, $parameters];
    }
Confirmed rule is applied to confirmed attribute.

@param $attribute
@param array $parameters
@return array