fiery serpents. burning. Hebrew. nacheshim saraphim. Figure of speech Metonymy (of Effect), App-6, because the effect of the bite was. burning sensation. Hebrew. saraph (see App-43.) The Seraphim so called in Isaiah 6:2, because they were burning ones: hence the name for these serpents. In the same way nachash, shining one, is also used for serpents, because they are shining ones in appearance. See Genesis 3:1, and compare App-19.
Related Commentaries of Numbers 21:6
Numbers 21:6
6 And the LORD sent fiery serpents among the people, and they bit the people; and much people of Israel died.