Re-entry procedure

Hello, I want to know that, if you have a 2 years valid working visa and you want to go for vacation for a month and return before the expiry of the visa.  So before leaving, you need any stamp on the passport visa page in order to re-enter or can re-enter without any specific procedure?

Don't confuse Bahrain with Saudi.  You don't need any separate stamp or visa for re-entry.