Jamieson, Fausset and Brown on Exodus 16:2

2. the whole congregation ... murmured against Moses and Aaron--Modern travellers through the desert of Sinai are accustomed to take as much as is sufficient for the sustenance of men and beasts during forty days. The Israelites having been rather more than a month on their journey, their store of corn or other provisions was altogether or nearly exhausted; and there being no prospect of procuring any means of subsistence in the desert, except some wild olives and wild honey (De 32:13), loud complaints were made against the leaders.