I am GettingThis error(Missing required parameters for [Route: property.edit] ), when editing product

I am trying to edit product, But my route is not working, Please let me know How This Resource Route Will Work.

This is my Web File

Route::resource('product', 'ProductController')->except([
    'store', 'update', 'destroy', 'edit'
]);

Here is my Controller File:

public function edit($product)
{
  $product=Product::find($product);
  return view('admin.product.edit', compact($product));
}

Here is my View File;

<li><a href="">Edit</a></li>

via Chebli Mohamed