The word(s) "enemy" appears 31 time(s) in 28 verse(s) in Quran in Abdullah Yusuf Ali translation.

(21) O ye Children of Israel! We delivered you from your enemy, and We made a Covenant with you on the right side of Mount (Sinai), and We sent down to you Manna and quails:

(22) Then We said: "O Adam! verily, this is an enemy to thee and thy wife: so let him not get you both out of the Garden, so that thou art landed in misery.

(23) Thus have We made for every prophet an enemy among the sinners: but enough is thy Lord to guide and to help.

(24) And he entered the city at a time when its people were not watching: and he found there two men fighting,- one of his own religion, and the other, of his foes. Now the man of his own religion appealed to him against his foe, and Moses struck him with his fist and made an end of him. He said: "This is a work of Evil (Satan): for he is an enemy that manifestly misleads!"

(25) Then, when he decided to lay hold of the man who was an enemy to both of them, that man said: "O Moses! Is it thy intention to slay me as thou slewest a man yesterday? Thy intention is none other than to become a powerful violent man in the land, and not to be one who sets things right!"

(26) Verily Satan is an enemy to you: so treat him as an enemy. He only invites his adherents, that they may become Companions of the Blazing Fire.

(27) "Did I not enjoin on you, O ye Children of Adam, that ye should not worship Satan; for that he was to you an enemy avowed?-

(28) Let not the Evil One hinder you: for he is to you an enemy avowed.