If a person keeps his hands in the mouth of a tiger and cries that he is very scared of the tiger and seeks the safety of an invincible fort to save himself from the animal attacking him! This is like the person who keeps crying for protection from Satan but is, in fact, submissive to and under his evil spell.

As long as a person uses foul language, he is the follower and slave of Satan. In this condition his cursing Satan will be a stark lie. One should seek Allah's forgiveness (astaghfar) for the Ista-aaza that he had done hypocritically!

The Ista-aaza of a foul-mouthed person, in the eyes of men of piety (irfaan) is tantamount to saying aaoozu bish shaitan, because he sometimes says aaooz and at others la haul, but his actions prove his falsehood.

If a tiger is chasing you, you will try to run into a fortified place of safety rather than going near it and putting your hands into it's mouth and keep shouting for help. Similar is the reality of Ista-aaza. It is seeking Allah's succor against Satan in His strong fortification!