Sforno on Exodus 16:16/ספורנו על שמות ט״ז:ט״ז

1'זה הדבר אשר צוה ה, and in the morning you will eat bread (food) to satisfy yourselves. (compare verse 12)

2לקטו ממנו, everyone to his heart’s desire. Some would take more, others less but איש לפי אכלו עומר לגלגלת, מספר נפשותיכם איש לאשר באהלו תקחו, it would not matter how much they would collect, for when they would measure it they would find that each one had exactly one omer per family member in his tent. Every Israelite would receive (ultimately) an equal share of the heavenly food G’d would provide. It would satisfy him in accordance with the amount of food he was used to consume regularly. If someone was in the habit of eating relatively little, he would not now be able to change his eating habits and gorge himself. On the other hand, if someone was a glutton, receiving heavenly food would not require him to downsize his appetite.