Exodus 16:13-18

13That evening quail came and covered the camp, and in the morning there was a layer of dew around the camp. 14When the layer of dew had evaporated, there were thin flakes on the desert floor, as fine as frost on the ground. 15When the Israelites saw it, they asked one another, “What is it?” For they did not know what it was.

So Moses told them, “It is the bread that the LORD has given you to eat. 16This is what the LORD has commanded: ‘Each one is to gather as much as he needs. You may take an omer1 for each person in your tent.’”

17So the Israelites did this. Some gathered more, and some less. 18When they measured it by the omer, he who gathered much had no excess, and he who gathered little had no shortfall.2 Each one gathered as much as he needed to eat.