here is a portion of a procedure I use on my system to find text….
DECLARE @Search varchar(255)
SET @Search="[10.10.100.50]"
SELECT DISTINCT
o.name AS Object_Name,o.type_desc
FROM sys.sql_modules m
INNER JOIN sys.objects o ON m.object_id=o.object_id
WHERE m.definition Like '%'+@Search+'%'
ORDER BY 2,1