Husk

In Num. 6:4 (Heb. zag) it means the "skin" of a grape. In 2
Kings 4:42 (Heb. tsiqlon) it means a "sack" for grain, as
rendered in the Revised Version. In Luke 15:16, in the parable
of the Prodigal Son, it designates the beans of the carob tree,
or Ceratonia siliqua. From the supposition, mistaken, however,
that it was on the husks of this tree that John the Baptist fed,
it is called "St. John's bread" and "locust tree." This tree is
in "February covered with innumerable purple-red pendent
blossoms, which ripen in April and May into large crops of pods
from 6 to 10 inches long, flat, brown, narrow, and bent like a
horn (whence the Greek name keratia, meaning 'little horns'),
with a sweetish taste when still unripe. Enormous quantities of
these are gathered for sale in various towns and for
exportation." "They were eaten as food, though only by the
poorest of the poor, in the time of our Lord." The bean is
called a "gerah," which is used as the name of the smallest
Hebrew weight, twenty of these making a shekel.