The below code will help us to find out a text in a store procedure/function in a particular database
DECLARE @TextToFind VARCHAR(100) = 'myTable'
SELECT
[Object Name] = o.Name
,[Object Type] = o.Type_Desc
,[Content In Text Mode] = c.Text
,[Creation Date] = o.Create_Date
,[Last Modification Date] = o.Modify_Date
FROM Sys.Objects o
JOIN SysComments c
ON o.object_id = c.id
WHERE o.[Type] IN ('FN','TF','P')
AND c.Text LIKE '%' +@TextToFind + '%'
ORDER BY o.[Type]
Hope this will be helpful