How to I add a new element in request laravel

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Laravel

Im kinda new to laravel and i tried to add body. (as there is 2 elements, Name and Body) to have an update crud, however i dont know how to add body to the string

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class BedrijfUpdateRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        $bedrijf = $this->route('bedrijven');
        return [
            'name' => 'string|min:2|max:75|required|unique:bedrijven,name,'.$bedrijf->id
            
        ];
    }
    
}

What I have tried:

i tried

public function rules()
    {
        $bedrijf = $this->route('bedrijven');
        return [
            'name' => 'string|min:2|max:75|required|unique:bedrijven,name,'.$bedrijf->id
        ];
        [
            'body' => 'string|min:2|max:75|required|unique:bedrijven,body,'.$bedrijf->id
        ];
    }
    
}

public function rules()
    {
        $bedrijf = $this->route('bedrijven');
        return [
            'name', 'body' => 'string|min:2|max:75|required|unique:bedrijven,name,body'.$bedrijf->id
        ];
    }
    
}

and even (this one is paticullarly bad)

    public function rules()
    {
        $bedrijf = $this->route('bedrijven');
        return [
            'name' => 'string|min:2|max:75|required|unique:bedrijven,name,'.$bedrijf->id
        ];
    }
    public function rules()
    {
        $bedrijf = $this->route('bedrijven');
        return [
            'body' => 'string|min:2|max:75|required|unique:bedrijven,body,'.$bedrijf->id
        ];
    }
    
}