UnixHowTo: How to find a particular word in a list of files in UNIX?

I am about to find the string "sqlplus" in a list of shell scripts:-

$ find . -name "*.sh" -print | xargs grep -l sqlplus

./hasimsampleshell1.sh
./hasimsampleshell2.sh

$ find . -name "*.sh" -print | xargs grep sqlplus

./hasimsampleshell1.sh: $ORACLE_HOME/bin/sqlplus -s scott/tiger@localhost @testsql2.sql

./hasimsampleshell2.sh: $ORACLE_HOME/bin/sqlplus -s scott/tiger@localhost @testsql2.sql