U DON'T NEED ANOTHER EXIT VISA AS U R NOT ENTERING QATAR AGAIN .. BUT MAKE SURE U HAVE UR UAE VISA STAMPED ON UR PASSPORT OTHERWISE SAUDI IMGRATION WILL NAOT LET U OUT TO UAE .. ALSO U NEED A TRANSIT VISA FROM SAUDI EMBASSY IN UAE 2 COME BACK 2 QATAR AS U WILL PASS SAUDI AGAIN ..