How to grep a particular string and list all the files

$cd $ORACLE_HOME/dbs; grep user_dump_dest initxxxdev.ora
Output:
user_dump_dest=/u01/app/oracle/admin/initxxxdev/udump
$cd /u01/app/oracle/admin/initxxxdev/udump; grep 'CREATE CONTROLFILE' *\ awk -F: '{print $1}'xargs ls -ltr
Output:
-rwx-rwx--- Oracle Oinstall 4499 Nov 12:30 xxxdev_ora_4515.trc