﴿ تِلْكَ ءَايَٰتُ ٱلْكِتَٰبِ ٱلْمُبِينِ ﴾

“These are messages of a divine writ clear in itself and clearly showing the truth.”

Those namely these signs are the signs of the Manifest Book the genitive annexation conveys the partitive sense of min ‘of’ ‘verses from the Manifest Book’ the Manifest Book which reveals truth from falsehood.