How to insert multiple rows in database using Eloquent in Laravel5

My controller looks something like this

    <?php

    namespace App\Http\Controllers;

    use Illuminate\Http\Request;
    use Illuminate\Support\Facades\Auth;
    use App\Http\Requests;
    use App\Http\Controllers\Controller;
    use App\Http\Middleware\Role;
    use Illuminate\Support\Facades\Input;
    use App\Http\Requests\PaymentRequest;
    use App\User;
    use App\Invoice;
    use App\comments;
    use Session;
    use Validator;


    class CollectionController extends Controller
    {
        /**
         * Display a listing of the resource.
         *
         * @return Response
         */

      public function __construct(){

        $this->middleware('role:collector'); // replace 'collector' with whatever role you need.
    }


  public function postPayment(PaymentRequest $request){

          $insertPayment=Input::get();

          $payment= new paymentrecieved();
          $comment= new comments();

          $payment->invoice_id=$insertPayment['invoiceid'];
          $payment->recieved_amount=$insertPayment['recieved_amount'];
          $payment->refno=$insertPayment['ref_no'];
          $payment->date=$insertPayment['date'];

         if($insertPayment['adjustmentmode']=='Option')
          $payment->adjust_mode='NONE';
          else
            $payment->adjust_mode=$insertPayment['adjustmentmode'];
            $payment->save();

          $request->session()->flash('alert-success', 'Payment Has Been inserted Successfully');
          return redirect('collection/payment/1');

          //dd($insertPayment); 
 }




        }

So in my form the Payment related details are in an array I want to know how I can create multiple row ? and save it all together once .

Thanks & Regards

via Chebli Mohamed