[...whereby it is melted] meaning: whereby is melted [what is within their bellies and the skins] meaning: and the skins are burned by it.
﴿يصهر بِهِ﴾ أَيْ: يُذَابُ بِهِ ﴿مَا فِي بطونهم والجلود﴾ أَي: وَتحرق بِهِ الْجُلُود
