Ibn Taymiyyah rejects the belief of “Kun fa Yakun” (Be and it is)
Some people falsely claimed that Shaykh Al-Islam ibn Taymiyah believes in Kun fa Yakun for creation, that saints say to something “Be” and the matter is.
Shaykh Al-Islam Ibn Taymiyah said in his Majmu Fatawa v 4 p 378:
“Then suppose that such is in the world, so how will they do in the hereafter? It came in the Athar (report): “O my servant , I say to something be and it is (Kun fa Yakun), obey me and I will make you say to something be and it will be. O my servant, I am the Living who does not die, obey me and I will make you living without dying”
Comment on this quote: Ibn Taymiyah clearly said before quoting this report that this will be in the hereafter, so it is not for this world. Whoever obeys Allah, Allah will give him paradise in which he will have whatever he wills, likewise if he obeys Allah, Allah will give him eternal life in paradise, he will remain alive and never die in paradise. So this is clear Ibn Taymiyah used this report, which is probably from Israeeliyat, for paradise
Also, ibn Taymiyah said in “Mukhtasar Fatawa Misriyah”:
ومن قال إن أحدا من أولياء الله يقول للشيء كن فيكون فأنه يستتاب، فأن تاب و إلا قتل، فأنه لا يقدر أحد على ذلك إلا الله سبحانه وتعالى
“Whoever says: “One of the Awliya says about something: be (kun), and it is so (fa yakun)”, repentance should be sought and either he repents or he is killed, as indeed none is capable of such except Allah Subhanahu wa Taala, and the son of Adam will not obtain whatever he wills, whoever he might be, but in the hereafter he will obtain whatever he wills…”
Ibn Taymiyah clearly says that in the hereafter he will obtain whatever he wills and not in the world, rather such a belief for Ibn Taymiyah is Kufr
See P 587 of this pdf
May Allah send Salah and Salam on the Prophet (saw), his family and companions!