The Ruling on Saying: "Allâh the Magnificent, Has Spoken the Truth"

Question :

What is the ruling on saying "Allâh the Magnificent has Spoken the truth" when one finishes reciting Qur'an?

Answer:

Although this practice has become prevalent among people, it has no basis according to the scholars; therefore one should not make it a habit or a ritual to say this phrase after reading the Qur'an.

It is a practice that falls under the ruling of the saying of the Prophet ﷺ:
"Whoever does a deed that is not in accordance with this matter of ours, then it is rejected."

So this resembles an innovation, even if we do not call it an innovation since it is commonly considered required in every case of recitation, and some go even as far as to recite this phrase during their prayer.

So it has not been related from the Prophet ﷺ, nor his Companions, nor the predecessors of this nation, that any of them would say "Allah the Magnificent has Spoken the truth."

Simply because this practice is now widespread, and because some people approve of it and reason that it is good, this isn't enough to make it allowed, good, or required. If a person reads a verse of the Qur'an, and is in awe of what the verse signifies in terms of penetrating meaning, he may, in such an instance, say, "Allah, the Almighty, has spoken the truth." But as for saying this as a habit every time one reads the Qur'an, this has no basis according to what we know: we reached this conclusion only after having researched this issue thoroughly and after having discussed it with the people of knowledge.

Source:
Fatawa Islamiyah, Vol. 7 Pages 59-60