God had just led the Israelites by way of Moses across the Red Sea, through stilled walls of ocean water, and on dry ground. In quick succession, their celebration turned to desperation. After walking for three days through the dessert they still had found no water; just as they spotted water they learn it was undrinkable. Their complaints to Moses were in no uncertain terms: we’re thirsty, what are we going to drink? Surely they’d remembered how miraculously God had just saved them.