without regard to their genealogical enrollment, to the males from thirty years old and upward-- everyone who entered the house of the LORD for his daily obligations-- for their work in their duties according to their divisions;
Strong's Concordance
Original word: σπένδω
Transliteration: spendó
Definition (short): libation
Definition (full): to pour out (as a drink offering), to make a libation
NAS Exhaustive Concordance
Word Origin: a prim. verb
Definition: to pour out (as a drink offering), to make a libation
NASB Translation: drink offering (2), poured out as a drink (2).
Apparently a primary verb; to pour out as a libation, i.e. (figuratively) to devote (one's life or blood, as a sacrifice) ("spend") -- (be ready to) be offered.