Consequence for blacklist ofw in KSA w/o unknown reason

My husband working in jeddah for 9 years,February 2015 he has re-entry visa and came back to his work,March 22,2016 his employer send him back to phillipines and they said his blacklisted in KSA,but when he applied in one the company in dammam he got visa.
But when he came in dammam this October 11,2016,his visa hold in immigration.
Is Saudi government will send him back to the Philippines or what will they do to him.
Please help me to have an idea.
I'm too worried for him.

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