Consultation through relationships in laravel

I searched endlessly for a question that answered my question here and I didn't find it. My question is as follows, I have 3 models: User, Post and Comments. Where user has a relationship with one to many posting, and Post has a relationship with one to many comments as well. How can I get all of the user's comments on all posts? Currently my solution looks like this:

Models Users:

    public function comments(){
        $comments = array();

        foreach ($this->posts()->get() as $el) {
            foreach ($el->posts()->get() as $nEl) {
                array_push($comments, $nEl);
            }
        }
        return collect($comments);
    }

I would like a less expensive and native solution for laravel, if any.

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