Divine witnessing and accountability

قَالَ ذَٰلِكَ بَيْنِى وَبَيْنَكَ ۖ أَيَّمَا ٱلْأَجَلَيْنِ قَضَيْتُ فَلَا عُدْوَٰنَ عَلَىَّ ۖ وَٱللَّهُ عَلَىٰ مَا نَقُولُ وَكِيلٌ

[Moses] said, "That is [established] between me and you. Whichever of the two terms I complete - there is no injustice to me, and Allāh, over what we say, is Witness."