Abihu in Easton's Bible Dictionary
father of Him; i.e., "worshipper of God", the second of the
sons
of Aaron (Ex. 6:23; Num. 3:2; 26:60; 1 Chr. 6:3).
Along with his
three brothers he was consecrated to the priest's
office (Ex.
28:1). With his father and elder brother he
accompanied the
seventy elders part of the way up the mount with
Moses (Ex.
24:1,9). On one occasion he and Nadab his brother
offered
incense in their censers filled with "strange"
(i.e., common)
fire, i.e., not with fire taken from the great
brazen altar
(Lev. 6:9, etc.), and for this offence they were
struck dead,
and were taken out and buried without the camp (Lev.
10:1-11;
comp. Num. 3:4; 26:61; 1 Chr. 24:2). It is probable
that when
they committed this offence they were intoxicated,
for
immediately after is given the law prohibiting the
use of wine
or strong drink to the priests.
Link: https://bible-history.com/eastons/A/Abihu/