What evidence is there that people who take away their own life go to hell?

In the past I have heard religious people say suicide is a sin and people who do it cannot go to heaven.

I’m not suicidal right now. I don’t want to die right now. My life isn’t that miserable.

Nobody in my close biological family has committed suicide but I recently went over to my uncles house and saw a picture of my cousin in a picture frame on the shelf. She was standing next to a man I have never seen before. I asked my uncle who the man in the picture was and he told me that was my cousins ex-boyfriend who commited suicide about a decade ago

What evidence is there that people who take away their own life go to hell?
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