A stone
'eben (eh'-ben)
a stone -- + carbuncle, + mason, + plummet, (chalk-, hail-, head-, sling-)stone(-ny), (divers) weight(-s).
is heavy
kobed (ko'-bed)
weight, multitude, vehemence -- grievousness, heavy, great number.
and the sand
chowl (khole)
sand (as round or whirling particles) -- sand.
weighty
netel (nay'-tel)
a burden -- weighty.
but a fool's
'eviyl (ev-eel')
(figuratively) silly -- fool(-ish) (man).
wrath
ka`ac (kah'-as)
vexation -- anger, angry, grief, indignation, provocation, provoking, sore, sorrow, spite, wrath.
is heavier
kabed (kaw-bade')
heavy; figuratively in a good sense (numerous) or in a bad sense (severe, difficult, stupid) -- (so) great, grievous, hard(-ened), (too) heavy(-ier), laden, much, slow, sore, thick.
than them both
shnayim (shen-ah'-yim)
two; also (as ordinal) twofold -- both, couple, double, second, twain, + twelfth, + twelve, + twenty (sixscore) thousand, twice, two.