وَاللَّيْلِ إِذَا يَغْشَىٰ وَالنَّهَارِ إِذَا تَجَلَّىٰ وَمَا خَلَقَ الذَّكَرَ وَالْأُنْثَىٰ إِنَّ سَعْيَكُمْ لَشَتَّىٰ
By the night as it covers, the day as it appears, and the Creator—or creating—of male and female: your strivings are indeed diverse. (92:1–4)
The oath response is clearly inna saʿyakum la-shattā. Inna and the predicate lām reinforce the claim. After cosmic contrasts, the discourse asserts diversity in human striving.
This differs from the recognized debate over the oath answer in al-Shams. The two surahs share the oath technique but differ in how their subsequent arguments unfold.