أَصَاحِ تَرَى بَرْقًا أُرِيكَ وَمِيضَهُ / كَلَمْعِ الْيَدَيْنِ فِي حَبِيٍّ مُكَلَّلِ
Companion, do you see the lightning whose flash I show you? It gleams like the rapid movement of hands within a piled-up cloud.
Aṣāḥi calls to a companion. Wamīḍuhu is the flash of lightning, while ḥabiyy mukallal evokes piled and layered cloud. The picture is of repeated flashes rather than a steady light.