"And why did you, when you entered your garden, not say, 'What Allah willed [has occurred]; there is no power except in Allah (Maa shaa Allaahu laa quwwata illaa billaah)'? Although you see me less than you in wealth and children." (Soorah al-Kahf, 18:39)
Some scholars have said based on the above ayah, that if a person sees something that pleases him with regards to his wealth he should say, "Maa shaa' Allaahu laa quwwata illaa billaah."
And if it is with regards to oneself, or someone/something else, he should say, "Allaahumma baarik wa laa tadurrahu," "Allaahumma baarik 'alayhi" "Allaahummah baarik feehi" etc based on the hadeeth, "If one of you sees in himself or his brother something that he likes, let him pray for blessings, for the evil eye is real." [al-Haakim]
"Whoever sees something, likes it - and says 'Māshā-Allāh lā quwwata illā billāh' - nothing will harm him [meaning he will stay protected from the evil eye]."
It is stated in another Hadīth:
ما أنْعَمَ اللَّهُ عَزَّ وَجَلَّ على عَبْدٍ نِعْمَةً في أهْلٍ ومَالٍ وَوَلَدٍ فَقالَ: ما شاءَ اللَّهُ لا قُوَّةَ إِلاَّ باللَّهِ، فَيَرَى فِيها آفَةً دونَ الموت
"Allah does not bestow any favor in terms of family, wealth and children to [His] slave, after which he says: 'Māshā-Allāh, laa quwwata illaa billaah' and he will see a calamity in it besides death [meaning he is protected from every calamity besides death]."
Hence, reciting Māshā-Allāh immobilizes the effects of the evil eye.
Taken from AskImam website (fatwa #28804, can't link as I'm still a newbie)
This cannot be undone and I am sure it will be greatly appreciated.
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