John Calvin Commentary Deuteronomy 8:10

"And thou shalt eat and be full, and thou shalt bless Jehovah thy God for the good land which he hath given thee." — Deuteronomy 8:10 (ASV)

When you have eaten and are full. In these words, he admonishes them that they would be too senseless unless God’s great bounty should attract them to obedience, since nothing is more unreasonable, than not to acknowledge from where our food has come when we have eaten and are full. Fittingly, then, does Moses require gratitude from the people when they will enjoy both the land promised to them and an abundance of all good things.