How to join three table by Laravel eloquent model

My schema

I have three table:

Articles table
Categories table
Users table

I want to show articles with their category name instead of category_id and user_name instead of user_id I try like these query It is work! But I want to do by Eloquent way.

$articles =DB::table('articles')
                ->join('categories', 'articles.id', '=', 'categories.id')
                ->join('users', 'users.id', '=', 'articles.user_id')
                ->select('articles.id','articles.title','articles.body','users.username', 'category.name')
                ->get();

Please, how could I do?

Learning Laravel Eloquent for Join

With Eloquent its very easy to retrieve relational data checkout following example with your senario in Laravel 5, we have three models:

Article (belongs to user and category)
Category (has many articles)
User (has many articles)

Article Model

class Article extends Model
{
    //
    protected $fillable = [
        'title', 'text', 'user_id','categories_id',
    ];

    public function user()
    {
    	return $this->belongsTo('App\User');
    }

    public function category()
    {
    	return $this->belongsTo('App\Category');
    }
}

Category Model

class Category extends Model
{
    //
    protected $fillable = [
        'name',
    ];
	
	public function articles()
	{
		return $this->HasMany('App\Article');
	}

}

User Model

class User extends Authenticatable
{
    use Notifiable;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'email', 'password',
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];

        
    public function articles()
    {
        return $this->HasMany('App\Article');
    }
}

Home Controller

    public function index()
    {
        //
    	$articles = Article::with(['user', 'category'])->get();

    	$users = User::with('articles')->get();

    	$categories = Category::with('articles')->get();

        dd(['articles' => $articles->toarray(),
        	'users' => $users->toarray(),
        	'categories' => $categories->toarray(),
        ]);
    }

AmirHome / Lara_Join