Numbers 26:60-61

26:60 And to Aaron were born Nadab and Abihu, Eleazar and Ithamar. 26:61 But Nadab and Abihu died when they offered strange fire before the Lord.

tn The expression אֵשׁ זָרָה (’esh zarah, “strange fire”) seems imprecise and has been interpreted numerous ways (see the helpful summary in J. E. Hartley, Leviticus [WBC 4], 132-33). The infraction may have involved any of the following or a combination thereof: (1) using coals from some place other than the burnt offering altar (i.e., “unauthorized coals” according to J. Milgrom, Leviticus [AB], 1:598; cf. Lev 16:12 and cf. “unauthorized person” [אִישׁ זָר, ’ish zar] in Num 16:40 [17:5 HT], NASB “layman”), (2) using the wrong kind of incense (cf. the Exod 30:9 regulation against “strange incense” [קְטֹרֶת זָרָה, qÿtoret zarah] on the incense altar and the possible connection to Exod 30:34-38), (3) performing an incense offering at an unprescribed time (B. A. Levine, Leviticus [JPSTC], 59), or (4) entering the Holy of Holies at an inappropriate time (Lev 16:1-2).

sn This event is narrated in Lev 10:1-7.