That is so al-'Azeez will know that I did not betray him in [his] absence and that Allah does not guide the plan of betrayers.
The Saheeh International Quran Translation
ذَٰلِكَ لِيَعْلَمَ أَنِّى لَمْ أَخُنْهُ بِٱلْغَيْبِ وَأَنَّ ٱللَّهَ لَا يَهْدِى كَيْدَ ٱلْخَآئِنِينَThat is so al-'Azeez will know that I did not betray him in [his] absence and that Allah does not guide the plan of betrayers.