Fiery snake bites[1]
וידבר העם באלקים ובמשה למה העליתנו ממצרים למות במדבר וגו’ וישלח יקוק בעם את הנחשים השרפים וינשכו את-העם וגו’ ויבא העם אל-משה ויאמרו חטאנו כי-דברנו ביקוק ובך התפלל אל-יקוק ויסר מעלינו את-הנחש ויתפלל משה בעד העם: ויאמר יקוק אל-משה עשה לך שרף ושים אתו על-נס והיה כל-הנשוך וראה אתו וחי: ויעש משה נחש נחשת וישמהו על-הנס וגו’
The nation spoke against G-d and Moshe: “Why did you take us out of Egypt to die in the wilderness?!”… Hashem sent against the nation the nechashim haserafim (stinging snakes), and they bit the people… The nation came to Moshe and said: “We have sinned! For we have spoken against G-d and you. Pray to G-d to remove from us the snakes”. Moshe prayed on behalf of the nation. Hashem said to Moshe: “Make for yourself a saraf (snake; lit. burning/stinging), and place it on a staff, and it will be that all who were bitten will look at it and live.” Moshe made a copper nachash (snake), and placed it on the staff…[2]
As the verses describe, the Jewish nation spoke rudely against Hashem and against His servant Moshe. The resulting punishment was Hashem unleashed against them a swarm of snakes, described in the verse as the nechashim haserafim, the stinging snakes. They bit the people, and many died. The nation repented, and Moshe prayed that the threat be removed. Hashem told Moshe to make some sort of statue of a snake, and called it a saraf. The verse then tells us that Moshe made a copper nachash, which means snake. How did Moshe know to make the statue out of copper? Rashi tells us[3] that since Hashem told Moshe to make a nachash, His intent must have been a copper one, since the Hebrew word for copper is nechoshes, etymologically related to nachash. The obvious question on this is that Hashem told Moshe to make a saraf, not a nachash[4]. If they’re the same thing, why is the Torah inconsistent in its terminology[5]? If they’re not the same thing, what is Rashi saying[6]?