وَيَوْمَ تَقُومُ السَّاعَةُ ... مَا لَبِثُوا غَيْرَ سَاعَةٍ
When the Hour arises, they will say they remained only an hour.
The two occurrences of “sāʿah” share their written and phonetic structure but refer respectively to the Hour and a short period of time. Complete jinās depends on agreement in letter identity, number, vocalization, and order, with a difference of sense.
Had both occurrences carried exactly the same sense, mere repetition would not supply this example of complete paronomasia. Both formal identity and semantic divergence need proof.