Surat Al A`raf: (200-201)

{وَإِمَّا يَنزَغَنَّكَ مِنَ الشَّيْطَانِ نَزْغٌ فَاسْتَعِذْ بِاللّهِ إِنَّهُ سَمِيعٌ عَلِيمٌ} [الأعراف: 200]

200- When you feel Satanic insinuations that try to keep you away from goodness, seek refuge with Allah and hold firm with Him, for He is All-Responding to what you say, and All-Knowing with Your beseeching and need.

{إِنَّ الَّذِينَ اتَّقَواْ إِذَا مَسَّهُمْ طَائِفٌ مِّنَ الشَّيْطَانِ تَذَكَّرُواْ فَإِذَا هُم مُّبْصِرُونَ} [الأعراف: 201]

201- When the obedient believers are hit by satanic insinuations or bad thoughts, they know that Satan is the source of that evil. So, they remember the command of Allah, seek refuge with Him, and return to their Lord after they had known their error and fixed it then they followed the right course again.