psql help

Hello:

Following works-

SELECT pid, pg_terminate_backend(pid) FROM pg_stat_activity
WHERE pid IN (select unnest(pg_blocking_pids(pid)) from pg_stat_activity where cardinality(pg_blocking_pids(pid)) > 0)
and usename = 'DBUSER_10'
and now() - state_change >= interval $a'${TIMEOUT_MINS}'$a
order by now() - state_change >= interval $a'${TIMEOUT_MINS}'$a desc limit 1;

How can I rewrite the above in psql and pg_terminate_backend all pids that meet above criteria (essentially remove limit 1) ?

Thanks!

Note:
I run this in Linux. TIMEOUT_MINS is env variable.