﴿ ٱسْتَحْوَذَ عَلَيْهِمُ ٱلشَّيْطَٰنُ فَأَنسَىٰهُمْ ذِكْرَ ٱللَّهِ ۚ أُو۟لَٰٓئِكَ حِزْبُ ٱلشَّيْطَٰنِ ۚ أَلَآ إِنَّ حِزْبَ ٱلشَّيْطَٰنِ هُمُ ٱلْخَٰسِرُونَ ﴾

“Satan has gained mastery over them, and has caused them to remain oblivious of the remem­brance of God. Such as these are Satan’s partisans: oh, verily, it is they, the partisans of Satan, who will truly be the losers!”

(The devil hath engrossed them) Satan has conquered them and commanded them to obey him, and they did, (and so hath caused them to forget remembrance of Allah) until they left obeying Allah in private. (They) i.e. the hypocrites and the Jews (are the devil's party) the army of the devil. (Lo! is it not the devil's party) the devil's army (who will be the losers) of the life of the world and the Hereafter?