No such column ‘BusinessHours’ on entity ‘Case’ Exception in Salesforce is thrown since BusinessHours is not a column or field in Case Entity. Instead use BusinessHoursId or BusinessHours.Name.

As per the Case object definition(https://developer.salesforce.com/docs/atlas.en-us.object_reference.meta/object_reference/sforce_api_objects_case.htm), the API Name is BusinessHoursId. So, do not use BusinessHours as the column or field name in the SOQL.

Sample SOQL:

SELECT Id, BusinessHours.Name
FROM Case
WHERE Id = '5005e00000GT9Gi'