Surah Al-Baqarah, ayah 208

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ ٱدۡخُلُواْ فِي ٱلسِّلۡمِ كَآفَّةٗ وَلَا تَتَّبِعُواْ خُطُوَٰتِ ٱلشَّيۡطَٰنِۚ إِنَّهُۥ لَكُمۡ عَدُوّٞ مُّبِينٞ ٢٠٨

Yā'ayyuhal-ladhīna āmanudkhulū fis-silmi kāffatan walā tattabi'ū khutuwātish-shaytāni innahū lakum 'aduwwum mubīn

O you who have believed, enter into Islām completely [and perfectly] and do not follow the footsteps of Satan. Indeed, he is to you a clear enemy.