Sforno on Exodus 3:3/ספורנו על שמות ג׳:ג׳

1אסורה נא ואראה; I will try and understand the phenomenon by looking at it more closely. מדוע לא יבער הסנה. Why the Egyptians do not perish from the many plagues they have to endure. The normal reaction to burning is that the object afire is consumed by the fire, as mentioned in Ovadiah 18.