Should one inform a person who sees someone breaking their fast out of forgetfulness to abstain?

Question : As for the one who sees a person breaking his fast out of forgetfulness, should he inform him to abstain, or should he leave him alone?

Answer : He should inform him; it is obligatory for him to inform him, because he saw him doing something that invalidates his fast, so he must forbid him from doing it.

The presenter : May Allah reward you with good,