Sforno on Leviticus 26:10/ספורנו על ויקרא כ״ו:י׳

1ואכלתם ישן נושן, after the gentile nations have declined in numbers drastically, your farmers and your vine growers will increase and crops which had been sufficient for a year will become sufficient for a number of years. Not only will you have at your disposal quantity, but whatever you will grow yourselves will be a painless kind of farming, not backbreaking labour. (compare Psalms 72,16) and remember the saying of our sages in Baba Batra 90 that the land of Israel will grow ready made rolls for breakfast.

2וישן מפני חדש תוציאו, you will have enough to eat relying on the previous year’s harvest, even though you export some of that harvest to help needy people of other countries to support themselves. We know that this was the function of this surplus from Isaiah 60,12 כי הגוי והממלכה אשר לא יעבדוך יאבדו, “any nation or government which will not serve You will surely perish.” The reason why Israel would export matters which are a lifeline for itself to pagan nations is because in the meantime they had already harvested the crop of the new year so that there was no reason to fear that any shortage would develop in their own country. Otherwise they would be bound by the edict of our sages in Baba Batra 90 that nothing vital is to be exported from Israel, meaning grain, oil, or grapes. (wine).