Sforno on Genesis 41:21/ספורנו על בראשית מ״א:כ״א

1ולא נודע כי באו אל קרבנה, analogous to the warning in Leviticus 26,26 that even when the Israelites would have food, eating it would not satiate them. We also have a statement by our sages describing the effect of food on those who have it (in the fridge) as being different than for those who run out immediately after having eaten their last provisions. The latter cannot feel the effect of what they have eaten because they do not know where their next meal will come from. (Yoma 74)