The Ruling on Supplicating during the Recitation in Prayer
Question :
I have heard some worshippers break off their recitation of the Qur'an during the prayer in order to make some suitable supplications. They say, when Paradise is mentioned: "O Allah! I ask you for Paradise" and when the Hell-Fire is mentioned: "O Allah! Protect me from the Fire." Is this permissible according to the Islamic law?
Answer:
It is a Sunnah for everyone who recites the Qur'an, in prayer or at other times, when he comes to a Verse which mentions (Allah's) Mercy, to ask Allah, the Most High of His Bounty; and when one comes across a Verse in which (Allah's) punishment is mentioned, he should seek refuge with Him from it. And if he reads a Verse in which the denial of negative traits attributed to Allah is mentioned, he should say: Subhanahu wa Ta'ala or the like. And it is preferred for every person who recites Is not Allah the Best of judges? to say: "Indeed (He is)! And I am one of the witnesses to that." And if he recites:
Is not He Able to give life to the dead?!
He should say: "Indeed! I testify (to that)." And if he recites:
In what message after this will they then believe?" He should say: "I have believed in Allah." And if he recites:
Then which of the Blessings of your Lord will you both.
He should say: "We do not deny anything of the Signs of Allah." And if he recites:
Glorify the Name of your Lord, the Most High.
He should say: "Glorified be my Lord, the Most High." This is preferred for the Imam and those whom he leads and the single worshipper, because it is a supplication like the Tamin. The ruling on recitation outside the prayer is the same.
Source:
The Permanent Committee
Fatawa Islamiyah, Vol. 2 Pages 256-257-258