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Question: Is it permissible for me to say: "O Allaah! Just as you have bestowed this blessing upon such-and-such, so bestow upon me the same"?
There is no harm in (making) this supplication which the questioner has mentioned; And this is from requesting that which is good for oneself - and it is called envy; It is that a person envies other than himself over something, and thereby wishes that he attains for himself what the other person has attained.
However, that which is prohibited is to be jealous - whether that be over something in the religion or the worldly life. And jealousy is when a person hopes for the cessation of a blessing from his brother (in Islaam) and (instead) for him to receive that blessing.
And Allaah has the complete knowledge (of all affairs).
Muhammed ibn 'Abdillaah as-Subayyal
Fataawa wa Rasaa.il Mukhtaarah - Page 551