(فَلَنَقُصَّنَّ عَلَيْهِم بِعِلْمٍ) (Then We will surely relate to them with knowledge): On that Day, Allah (swt) will show us by His Knowledge (swt) about all that has happened to mankind in the worldly life.

(وَمَا كُنَّا غَائِبِينَ) (and We were not [at all] absent): Allah (swt) is present everywhere and at all times. He (swt) says:

  وَهُوَ مَعَكُمْ أَيْنَ مَا كُنتُمْ

(and He is with you wherever you are) (Al-Hadid: 4)

Exalted be He (swt), for there is nothing similar to Allah (swt) in any way, neither in Attributes, nor Actions, nor His Existence (swt).