We know that Allah Himself is infinite. But is there any evidence that His word: The Qur’an is also infinite?

Should we treat Quran as the attribute of Allah or the creation of Allah?

The Qur’an is the word of Allah and not His creation and thus the Qur’an is one of the attributes of Allah and all of His attributes are unique. This Qur’an came to the Prophet (ﷺ) from Allah via Jibreel.[1] Allah spoke by using voice and this was heard by Jibreel and he carried and gave it to Prophet Muhammad (ﷺ). And to top it all up, Allah called it His Speech.[2]

Allah knows best.

References:

[1] Ibn Abi Al-‘Izz, Commentary on the Creed of At-Tahawi, 2/96

[2] Ibn Taymiyah, Sharh Aqeedatul Wasatiyah, 118