Exodus 16
18 Ref When they measured it with an omer, he who gathered much had nothing over, and he who gathered little had no lack. They gathered every man according to his eating.
19 Ref Moses said to them, "Let no one leave of it until the morning."
20 Ref Notwithstanding they didn't listen to Moses, but some of them left of it until the morning, and it bred worms, and became foul: and Moses was angry with them.