Laravel update query error using query builder with comma separeted values

I am getting the below error in the laravel controller when I update 4 columns with comma-separated values without quotes which are coming from the request

Request payload:
column1 : one,two,three
column2 : six,seven
column3 : eight,nine

 <?PHP
   function run(Request $request){
     $column1 = $request->get('column1');
     $column2 = $request->get('column2');
     $column3 = $request->get('column3');
     $save = DB::table('tableone')->where('primaryclm', '1')->update(['column1' => $column1,'column2' => $column2,'column3' => $column3]);
   }
 ?>

Error:
 SQL error (SQL: update `tableone` set `column1` = one,two,three 
,`column2` = four,five,six
,`column3` = seven,eight
 where `primaryclm` = 1)

Kindly help with this issue.