وَالضُّحَىٰ
By the brightness of morning. (الضحى: 1)
وَاللَّيْلِ إِذَا سَجَىٰ
And by the night when it becomes still. (الضحى: 2)
The first wāw is the oath particle and al-ḍuḥā is governed by it. The second wāw joins another object of the oath rather than coordinating two separate answers. The temporal clause idhā sajā selects the particular state of night when it settles into stillness.
Light and stillness establish a striking contrast before the consolation. Contrast is present, but it would be unsound to classify this automatically as every type of oppositional jāmiʿ: the coordinated oath structure already supplies a clear syntactic and rhetorical bond.