Just as Allah Ta‘ala is eternal in his being, He is also eternal in His divine attributes.

There is no change which overcomes Allah Ta‘ala‘ala by the passing of time – unlike man who with the passing of time, passes through various stages of development or change.

Allah Ta‘ala describes himself in many places of the Qur’aan Kareem.

Hazrat Ubayy bin Ka‘b (radhiyallahu ‘anhu) narrates that the disbelievers once came to Rasulullah (sallallahu ‘alaihi wasallam) and asked him to describe Allah Ta‘ala to them and sarcastically said, “Explain to us the lineage of Allah Ta‘ala.” In response, Allah Ta‘ala revealed Surah Ikhlaas:

قُلۡ ہُوَ اللّٰہُ اَحَدٌ ۚ﴿۱﴾ اَللّٰہُ الصَّمَدُ ۚ﴿۲﴾ لَمۡ یَلِدۡ ۬ۙ وَ لَمۡ یُوۡلَدۡ ۙ﴿۳﴾ وَ لَمۡ یَکُنۡ لَّہٗ کُفُوًا اَحَدٌ ٪﴿۴﴾

Say: “It is Allah, the One and Only. Allah is needed by all and in need of none. He neither begot anyone nor was he begotten and equal to him has never been anyone.” (Surah Ikhlaas)

(Sunan Tirmizi #3364/Haakim #3987)