Display entries based on 'entries fields'

Question

I want to display blog entries within the related entry template linked together with 'entries fields':

-- Entrysection Bla

Blog
-- Blog entry 1 (Linked to Entrysection Bla via 'entries fields')
-- Blog entry 2 (no relations)

Now I want to display Blog entry 1 in Entrysection Bla

{% for entry in craft.entries.section('bla') %}
  {% for entries_fields in craft.entries.section('blog'){# related to ??? #} %}
     <a href="{{ entries_fields.url }}">{{ entries_fields.title }}</a>
  {% endfor %}
{% endfor %}

I figured it has to be done with relatedTo but I cant get it done. How do I have to write this?

-- Edit:

Now my code on Entrysection Bla looks like this:

{% set entries_fields = craft.entries.section('blog').relatedTo({
   sourceElement: entry,
   field: 'blogSaisonKategorie'
}) %}

{% for xy in entries_fields %}
   <a href="{{ xy.url }}">{{ xy.title }}</a>
{% endfor %}

That prints out nothing. No error is displayed as well.

Answer 1

You are correct in your assumption! Using relatedTo with the associated field:

{% set entries_fields = craft.entries.section('blog').relatedTo({
    sourceElement: entry,
    field: 'fieldHandle'
}) %}

Note that field can be the field handle of your Entries Field but it can also be a field ID.

Answer 2

I had a huge mess and I started all over.

Thats the code which works:

      {# Gets the bla section #}
        {% for entry in craft.entries.section('bla') %}
          {# Gets the blog section related to bla #}
          {% set relatedBLogs = craft.entries.section('blog').relatedTo(entry) %}
          {% for entries in relatedBLogs %}
             <a href="{{ entries.url }}">{{ entries.title }}</a>
          {% endfor %}
        {% endfor %}

I thought I had to specify the entries fields but Craft determines the relational field without any declaration :O