The majority of the scholars state that reciting the Isti`adhah (in the prayer and when reciting the Qur’an) is recommended and not required, and therefore, not reciting it does not constitute a sin. However, Ar-Razi recorded that `Ata’ bin Abi Rabah said that the Isti`adhah is required in the prayer and when one reads the Qur’an. In support of `Ata’s statement, Ar-Razi relied upon the apparent meaning of the Ayah,
فَاسْتَعِذْ
Then seek refuge.
He said that the Ayah contains a command that requires implementation. Also, the Prophet always said the Isti`adhah. In addition, the Isti`adhah wards off the evil of Satan, which is neccessary, the rule is that the means needed to implement a requirement of the religion is itself also required. And when one says, “I seek refuge with Allah from the cursed devil.” Then this will suffice.
Virtues of the Isti`adhah
The Isti`adhah cleanses the mouth from the foul speech that it has indulged in. It also purifies the mouth and prepares it to recite the speech of Allah. Further, the Isti`adhah entails seeking Allah’s help and acknowledging His ability to do everything. The Isti`adhah also affirms the servant’s meekness, weakness and inability to face the enemy of his inner evil, whom Allah alone, Who created this enemy, is able to repel and defeat. This enemy does not accept kindness, unlike the human enemy. There are three Ayat in the Qur’an that affirm this fact. Also, Allah said,
إِنَّ عِبَادِى لَيْسَ لَكَ عَلَيْهِمْ سُلْطَـنٌ وَكَفَى بِرَبِّكَ وَكِيلاً
Verily, My servants (i.e. the true believers of Islamic Monotheism) ـ you have no authority over them. And sufficient is your Lord as a Guardian. (Al-Isra 65).
We should state here that the believers, whom the human enemies kill, become martyrs, while those who fall victim to the inner enemy – Satan – become bandits. Further, the believers who are defeated by the apparent enemy – disbelievers – gain a reward, while those defeated by the inner enemy earn a sin and become misguided. Since Satan sees man where man cannot see him, it is befitting that the believers seek refuge from Satan with Whom Satan cannot see. The Isti`adhah is a form of drawing closer to Allah and seeking refuge with Him from the evil of every evil creature.
What does Isti`adhah mean
Isti`adhah means, “I seek refuge with Allah from the cursed Satan so that he is prevented from affecting my religious or worldly affairs, or hindering me from adhering to what I was commanded, or luring me into what I was prohibited from.” Indeed, only Allah is able to prevent the evil of Satan from touching the son of Adam. This is why Allah allowed us to be lenient and kind with the human devil, so that his soft nature might cause him to refrain from the evil he is indulging in. However, Allah required us to seek refuge with Him from the evil of Satan, because he neither accepts bribes nor does kindness affect him, for he is pure evil. Thus, only He Who created Satan is able to stop his evil. This meaning is reiterated in only three Ayat in the Qur’an. Allah said in Surat Al-A`raf,
خُذِ الْعَفْوَ وَأْمُرْ بِالْعُرْفِ وَأَعْرِض عَنِ الْجَـهِلِينَ
Show forgiveness, enjoin what is good, and turn away from the foolish (don’t punish them) (Al-A’raf 199)
This is about dealing with human beings. He then said in the same Surah,
وَإِمَّا يَنَزَغَنَّكَ مِنَ الشَّيْطَـنِ نَزْغٌ فَاسْتَعِذْ بِاللَّهِ إِنَّهُ سَمِيعٌ عَلِيمٌ
And if an evil whisper comes to you from Shaytan, then seek refuge with Allah. Verily, He is Hearing, Knowing (Al-A’raf 200)
Allah also said in Surat Al-Mu’minun,
ادْفَعْ بِالَّتِى هِىَ أَحْسَنُ السَّيِّئَةَ نَحْنُ أَعْلَمُ بِمَا يَصِفُونَ
وَقُلْ رَّبِّ أَعُوذُ بِكَ مِنْ هَمَزَاتِ الشَّيـطِينِ
وَأَعُوذُ بِكَ رَبِّ أَن يَحْضُرُونِ
Repel evil with that which is better. We are Best-Acquainted with the things they utter. And say: “My Lord! I seek refuge with You from the whisperings (suggestions) of the Shayatin (devils). And I seek refuge with You, My Lord! lest they should come near me.” (Al-Mu’minun 96-98)
Further, Allah said in Surat Fussilat,
وَلاَ تَسْتَوِى الْحَسَنَةُ وَلاَ السَّيِّئَةُ ادْفَعْ بِالَّتِى هِىَ أَحْسَنُ فَإِذَا الَّذِى بَيْنَكَ
وَبَيْنَهُ عَدَاوَةٌ كَأَنَّهُ وَلِىٌّ حَمِيمٌ
وَمَا يُلَقَّاهَا إِلاَّ الَّذِينَ صَبَرُواْ وَمَا يُلَقَّاهَآ إِلاَّ ذُو حَظِّ عَظِيمٍ
وَإِمَّا يَنزَغَنَّكَ مِنَ الشَّيْطَـنِ نَزْغٌ فَاسْتَعِذْ بِاللَّهِ إِنَّهُ هُوَ السَّمِيعُ الْعَلِيمُ
The good deed and the evil deed cannot be equal. Repel (the evil) with one which is better, then verily he, between whom and you there was enmity, (will become) as though he was a close friend. But none is granted it (the above quality) except those who are patient ـ and none is granted it except the owner of the great portion (of happiness in the Hereafter : Paradise and of a high moral character) in this world. And if an evil whisper from Shaytan tries to turn you away (from doing good), then seek refuge in Allah. Verily, He is the Hearing, the Knowing (Fussilat 34-36).