Harry BM

(1) ויעמד בין המתים וגו׳ AND HE STOOD BETWEEN THE DEAD [AND THE LIVING] — He (Aaron) seized the Angel of Death and stopped him despite himself. The angel said to him, “Let me be, so that I may carry out my commission!” He (Aaron) answered him, “Moses has bidden me prevent you”. The angel replied, “I am the messenger of the Omnipresent whilst you are but the messenger of Moses!” Aaron retorted, “Moses does not say anything out of his own mind, but only at the command of the Almighty. If you do not believe me, behold, the Holy One, blessed be He, and Moses are at the entrance of the appointed tent; come with me and ask them!” This is the meaning of what is stated (v. 15): And Aaron returned unto Moses (i.e. returned together with the Angel of Death) (cf. Midrash Tanchuma, Tetzaveh 15 at end of תצוה). Another explanation is: Wherefore was the plague stayed by means of the incense? Because the Israelites were traducing and speaking ill of the incense, saying, “It is a deadly poison: through it Nadab and Abihu died; through it the two hundred and fifty men were burnt!” therefore the Holy One, blessed be He, said, You will see that it is also a means for restraining the plague, and it is only sin that brings death” (Mekhilta d'Rabbi Yishmael 17:5:3 on Exodus 17:5).