Series: Ten Means for the One Seeking Allaah’s Protection against Magic, The Evil Eye and Envy
The seventh means (of protection): To perform the (act of) repentance to Allaah for one’s sins, for sins are the cause behind being overpowered by one’s enemy. Indeed Allaah (The Most High) said: [وَمَا أَصَابَكُم مِّن مُّصِيبَةٍ فَبِمَا كَسَبَتْ أَيْدِيكُمْ – And whatever of misfortune befalls you, it is because of what your hands have earned. (42:30)]
A servant (of Allaah) is not overpowered by someone who harms him except due to sin, whether he is aware or unaware of it (i.e. the sin committed). The sins of a servant, which he is unaware of, are several times as much as what he knows. And the sins he has forgotten, which he is aware of and committed, are several times as much as what he can remember. In a well known supplication:
[اللَّهُمَّ إِنِّي أَعُوذُ بِكَ أَنْ أُشْرِكَ بِكَ وَأَنَا أَعْلَمُ ، وَأَسْتَغْفِرُكَ لما لا أعلم– O Allaah! I seek refuge with you from associating partners with you knowingly and I seek your forgiveness for what I do unknowingly. (Reported by Imaam Al-Bukhaari (rahimahullaah) in Al-Adabul Mufrad, Number 719 & declared authentic by Imaam Albaani (rahimahullaah) in Sahih Al-Adabul Mufrad, Number 551)].
The servant’s need for seeking forgiveness for his sins, which he is unaware of, are several times as much as the sins he is aware of. He is not overcome by (someone or something) harmful except due to sin, and no evil comes (to him) except as a result of sins and those (other deeds that necessitate such evil). If a person refrains from sins, he is relieved of its (evil consequences). And when a servant is transgressed against by an opponent, there is nothing more beneficial for him than (performing) sincere repentance for his sins, which were a cause of being overcome by his enemy.
[Abridged & slightly paraphrased. Source: Fiqhul Ad’iyah Wal Adhkaar ’ by Shaikh Abdur-Razzaaq Al-Badr (may Allaah preserve him); Page 221-222; Sections 3 & 4; Publisher: Daar Kunooz’ 1st Ed; 1426AH (Year 2005)]