שׁוּף, to blow. Num. R. s. 5, beg. וכיון … היתה האש שָׁפָה וכ׳ when the sparks (preceding the march of the Israelites) went forth, the fire blew (was wafted) towards those carrying the Ark; a. e.—Esp. (of the serpent, cmp. שָׂרָף; v. נָשַׁף) to emit poisonous breath, to poison. Midr. Till. to Ps. XCII (ref. to Ps. CXXXIX, 11) והיה יושב … וִישׁוּפֵנִי עקב and he (Adam) sat thinking in his heart, perchance the serpent that led me astray on the Sabbath eve will come and poison me in the heel. Lev. R. s. 15, end; Gen. R. s. 16; Yalk. ib. 22, v. נָשַׁף.