What is iqama?

I am going to be in Dhahran, Saudi soon for a business trip and looks like Bahrain would be a nice place to spend a weekend. I been reading this page lately and people been mentioning it would required a IQAMA to travel back and forth. Can someone please tell me what is IQAMA. Is a multi entry Saudi VISA be enough... show more I am going to be in Dhahran, Saudi soon for a business trip and looks like Bahrain would be a nice place to spend a weekend. I been reading this page lately and people been mentioning it would required a IQAMA to travel back and forth. Can someone please tell me what is IQAMA. Is a multi entry Saudi VISA be enough to enter and re-enter Saudi and Bahrain ?
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