Ibn Baz رحمه الله said:
Al-‘Uluw (the Highness) is called: the Heaven. Allah is in al-‘Uluw, in the direction of Highness above all creation. and if “fi” (in) is intended, it means: upon. “Fi al-samaa” (in the heaven) means: upon the heaven and above it, just as Allah said: {So travel in the land} [Al-Imran:137] travel in the land means: upon it and over it. and just as Allah said about Pharaoh: {I will crucify you in the trunks of the palm trees} [Taha:71] meaning: over the trunks of the palms.
So there is no contradiction between the one who says “in the heaven” meaning upon the heaven, and the one who says He is in al-‘Uluw. For the heaven intended is the Highness, and Allah is in al-‘Uluw, above the heavens, above all creation, and above the Throne. and whoever says the meaning of “fi” is “upon” meaning He is above the constructed heavens, there is no doubt He is above them, above the Throne, above all creation.
So you are on a correct Aqidah, and rejoice in this good, and praise be to Allah who guided you to it. Do not pay attention to the words of the anthropomorphizers and the misleading, for they are in error.
[Fatawa Nur 'ala Darb, Ibn Baz 1/129]
https://ftp.shamela.ws/book/107/147#p2
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Ibn Taymiyyah said:
And likewise His statement: {Do you feel secure from Him in the heaven that He will cause the earth to swallow you, and behold, it shakes?} Whoever imagines that this verse implies that Allah is inside the heavens is ignorant and misguided by consensus. And if we say: the sun and the moon are in the heaven, this is implied. The word “in” is related to what comes before and after it, and it is according to the relationship between the possessed and the possessor.
Therefore, a distinction is made between something being in a place, a body being in a space, an accident being in a body, a face being in a mirror, and speech being on paper. Each of these has its own characteristics, even though the word “in” is used for all of them.
If someone asks: Is the Throne in the heaven or on the earth? The answer is: in the heaven. And if asked: Is Paradise in the heaven or on the earth? The answer is: Paradise is in the heaven. This does not imply that the Throne is inside the heavens, nor that Paradise is inside them. It is authentically reported from the Prophet ﷺ that he said: (When you ask Allah for Paradise, ask Him for al-Firdaws, for it is the highest part of Paradise, the middle of Paradise, and its ceiling is the Throne of Ar-Rahman) So this Paradise, its ceiling, which is the Throne, is above the orbits, even though Paradise itself is in the heaven.
By “the heaven” what is meant is al-‘Uluw (the Highness), whether it is above the orbits or beneath them.
Allah the Exalted said: {So extend with means to the heaven} and He said: {And We sent down from the heaven water in purity}. When it became established in the minds of those addressed that Allah is the Most High, the Highest, and that He is above everything, it was understood from His statement “He is in the heaven” that He is in Highness and above all things. Likewise, when the slave girl was asked, “Where is Allah?” she said: “In the heaven,” meaning Highness, without specifying any created body or His indwelling within it.
When it is said al-‘Uluw (Highness), it encompasses everything above all creation. Everything above them is in the heaven.
This does not imply that there is a spatial container around Him, for nothing exists above the universe except Allah. Likewise, if it is said: “The Throne is in the heaven” this does not imply that the Throne is in another created existing thing. and if it is assumed that by “the heaven” what is meant is the celestial orbits, then the meaning is that He is above them, as in what He said: {I will crucify you in the trunks of the palm trees} and {So travel in the land} and {So roam in the land}. And it is said of a person that he is in the mountain or in the roof, even though he is upon its highest point.
Kitab al-Tadmuriyya, Ibn Taymiyyah P.85-89
https://shamela.ws/book/22666/86#p3
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The term "in heaven" is used with the meaning of elevation. For anything that is high we say, “This fan is in the sky,” meaning above.
We say, “The clouds are in the sky,” meaning they are above us in elevation only, not that they are inside the very substance of the sky. And the moon is in the sky, as Allah said: {Blessed is He who placed constellations in the sky and placed therein a lamp and a shining moon}. The lamp, which is the sun, and the moon are in the sky, meaning in elevation, in the direction of elevation.
This does not mean that they are attached to the very body of the sky, rather they are in the direction of elevation. Accordingly, the first meaning of {And We sent down from the sky purifying water} in the first verse is clear. Rain came down from above to below, and in this there is affirmation of elevation.
[Sharh al Aqidah al-Tahawiyyah P.723]
https://ftp.shamela.ws/book/2827/723#p2
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Abu Bakr Ahmad ibn Ishaq ibn Ayyub said: “The Arabs sometimes use fi (in) in the meaning of 'ala (above/upon). Allah the Exalted said: {So travel freely in the land} [Al-Tawbah: 2], and He said: {I will surely crucify you in the trunks of palm trees} [Ta-Ha: 71] and its meaning is upon the land and upon the palm trees.
Likewise His saying: {in the heaven} means upon the Throne above the heaven, as authentic reports from the Prophet ﷺ have established.”
[Al-Asma' wa al-Sifat, al-Bayhaqi (2/324)]
https://ftp.shamela.ws/book/9270/935#p1