They were armed with bows
Much used in war in those times: and could use both the
right hand and the left, in hurling stones, and
shooting arrows out of a bow;
they were ambidextrous; who could sling stones, or shoot arrows,
with either, which was no small advantage to them: even of
Saul's brethren of Benjamin;
they were of the tribe of Benjamin, of which Saul was, and so his
brethren; and they might be, at least some of them, his relations
and kinsmen; who observing the unreasonableness of Saul's enmity
to David, and detesting his cruelty, and sensible of the
innocence of David, and of the service he had done his country;
and perhaps not being ignorant of his divine right and title to
the kingdom, went over to him, to comfort, strengthen, and assist
him.