What would you tell to a suicidal person?

I don't know if you had a person you loved that have been gone like that but people generally says that they had no idea that person was suicidal or would do sth like that. That's the saddest part in my opinion. If you had known before, what would you say to that person? I mean it doesn't have to be super moral but I'm curious about your last things to say to that person.
What would you tell to a suicidal person?
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