Surah Az-Zukhruf (43:36)

وَمَن يَعْشُ عَن ذِكْرِ ٱلرَّحْمَٰنِ نُقَيِّضْ لَهُۥ شَيْطَٰنًا فَهُوَ لَهُۥ قَرِينٌ

And whoever grows dim away from the remembrance of the All-Merciful, We assign for him a satan, so he is for him a close associate.