After being cursed, expelled from paradise and being given respite until the appointed day, Iblees avowed, “surely I will sit in wait against them (human being) on your straight path. Then I will come to them from before them and behind them, from their right and from their left, and you will find most of them as thankful ones (i.e. they will not be dutiful to you)”. [Surah al-A’raf (7): 16-17]
Ibn Abbas (RS) explained, “When shaytan said this, it was a guess and an assumption on his part. Yet, the truth turned out to be the same is the same because Allah says in surah saba, “And indeed Iblees did prove true his thought about them, and they followed him, all except a group of true believers. And he had no authority over them, except that we might test him who believes in the Hereafter, from him who is in doubt about it. And your lord is watchful over everything…[surah Saba (34): 20-21]
So, although shaytan has no power over the believer, he is able to gain jurisdiction over those who accept his ideas and follow him willingly. Allah said to Iblees when he asserts to mislead the children of Adam, “certainly, you shall have no authority over my slaves except those who follow you of the Ghaawoon (those who go astray, criminals, polytheist, and evildoers)”. [Surah al- Hijr (15): 39-42] and it is mentioned in [surah an-Nahl (16): 99-100], “verily he (shaytan) has no power over those who believe and put their trust only in their Lord (Allah). His power is only over those who obey and follow him (shaytan), and those who join partners with (Allah)
Shaytan can thus, do no more than call people to bearded and make it took attractive to them. He has no power over them to force them in to accomplish what he wants. People who acknowledge his call do so because it suits their urges and desires. So the blame is attached only to those who greet him
On the day of judgment, the Quran (jinn companion who encourage evil deeds) will declare against man and disown the actions of man saying he was misguided in himself, receptive to falsehood and resistant to the truth as Allah says, “his Quran will say, ‘our lord I did not push him to transgression, (in disbelief, oppression, and evil deeds), but he was himself in error far astray’. Allah will say, ‘dispute not in front of Me, I had already in advance sent you the threat. The sentence that comes from me cannot be changed be changed, and I am not unjust to the slaves”. [Surah al-Qaaf (50): 27-29]

Shaytan is given power over the believer because of their sins, for example, Allah’s Messenger (PBUH) said about a Qadhi (judge), “Allah is with Qadhi so long as he is not unfair. If he judges unfairly, then he forsakes him and lets the shaytan be with him. [(Hasan) - Al-Hakim and Bayhaqee]