Question : How to get SQL statement for a trigger in ORACLE v10.2 database

Would like to get the sql statements for a trigger in Oracle database. For example,
--trigger tr1
CREATE OR REPLACE TRIGGER  tr1
......
end;
What sql statement should I issue to see the tr1's sql statements? i.e.,
--trigger tr1
CREATE OR REPLACE TRIGGER  tr1
......
end;

Answer : How to get SQL statement for a trigger in ORACLE v10.2 database

 SELECT *
    FROM dba_source
   WHERE TYPE = 'TRIGGER' AND name = 'TR1'
ORDER BY line