The children
ben (bane)
a son (as a builder of the family name), in the widest sense (of literal and figurative relationship, including grandson, subject, nation, quality or condition, etc.
of Immer
'Immer (im-mare')
talkative; Immer, the name of five Israelites -- Immer.
a thousand
'eleph (eh'-lef)
hence (the ox's head being the first letter of the alphabet, and this eventually used as a numeral) a thousand -- thousand.
fifty
chamishshiym (kham-ish-sheem')
fifty -- fifty.
and two
shnayim (shen-ah'-yim)
two; also (as ordinal) twofold -- both, couple, double, second, twain, + twelfth, + twelve, + twenty (sixscore) thousand, twice, two.