how do I change regexp_substr(to_char(bar), '^.*?$', 1, 1, 'm') to only read 132 characters each time

how do I change the query below so it only reads and displays 132 characters each line

with w(id, line#, line, rest) as (
  select id, 1, regexp_substr(to_char(bar), '^.*?$', 1, 1, 'm'), 
         substr(to_char(bar), regexp_instr(bar, '$', 1, 1, 1, 'm')+1)
  from foo
  union all
  select id, line#+1, regexp_substr(rest, '^.*?$', 1, 1, 'm'), 
         substr(rest, regexp_instr(rest, '$', 1, 1, 1, 'm')+1)
  from w
  where rest is not null ) cycle id, line# set is_cycle to '1' default '0'
select id, line#, line from w order by id, line#;

Thanks