When the wife of 'Imran delivered Maryam she said,
“Indeed I seek refuge with You for her and her offspring from Shaytan, the outcast.” [Surah AI-‘Imran (3): 36]
On the authority of Ibn 'Abbass (radhyAlldhu ‘anhuma) The Prophet (sallAllahu ‘alaihi wa sallam) used to seek refuge for Hasan and Husayn saying, Your father used to seek refuge for Isma’il and Ishaq saying,
A'udhu bi kalima til-Allahi-tamati min kulli Shaytanin wa hamate wa min kulli aynin lamati.
"I seek refuge in the perfect words of Allah from every Shaytan and every venomous reptile, and every evil eye"
  One of the reptiles there are poisonous ones and everything that contains poison, and those poisons that don't kill their venom is called toxins. The meaning is that every creature has some bad in it, according to al-Hafiz.
 Al-Khatabi said, it means every disease and epidemic that can affect man with regards to being possessed and mental insanity.
 Reported by Saheeh Bukhari.
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