אֲגַם
From LSJ
ἄνω ποταμῶν ἱερῶν χωροῦσι παγαί → the springs of sacred rivers flow upward, backward to their sources flow the streams of holy rivers
English (Strong)
from an unused root (meaning to collect as water); a marsh; hence a rush (as growing in swamps); hence a stockade of reeds: pond, pool, standing (water).