The 'ya' in 'diyaa'an' is transformed from a 'waw' of 'daw' due to the kasrah before it. And it was recited: 'da'aa' with two hamzah between them an alif on the heart, by placing the lam before the 'ayn, as it was said in 'aq: 'aqqa'. And 'diyaa' is stronger than 'nur' and He has measured it, and He has measured the moon. The meaning is that He has measured its course in stations, or He has measured it as having stations, like His saying, 'And the moon We have measured in stations.' And the calculation, and the calculation of the times from the months, days, and nights, that is an indication of the mentioned, meaning that He created it only intertwined with the truth, which is the perfect wisdom, and He did not create it in vain. And it was recited: 'yufassil', with a 'ya'.