Exodus 16:18-20 Modern English Version (MEV)
18 When they measured it with an omer, he that gathered much had nothing left over, and he that gathered little had no lack. They gathered every man according what he could eat.
19 Moses said to them, “Let no man leave any of it until the morning.”
20 However, they did not listen to Moses, and some of them left part of it until the morning, and it bred worms, and stank, and Moses was angry with them.