The Portion begins by instructing us concerning the laws of Shmita or the Sabbatical year. The fields are to lay fallow, no planting and no harvesting. A number of verses later the Torah says: וְכִי תֹאמְרוּ מַה נֹּאכַל בַּשָּׁנָה הַשְּׁבִיעִת, “If you will say, ‘What will we eat on the seventh year? Behold we will not sow and not gather in our crop.’ ” (Lev. 25,20) The question, of course, is, if they will not be able to work the fields during the seventh year, on what will they survive? The answer follows that Hashem will provide on the sixth year sufficient food to last for the time they cannot work.
The Ramban wonders, what is their concern about the seventh year. They have the growth of the sixth year. Their question should have been about the eighth year. He thus explains the words of the verse should be understood as saying, “If you will ask on the seventh year, what will we eat”, the concern is about what will they eat on the eighth year.
Other commentaries put a comma after the word “eat”. The meaning is, “What will we eat, on the seventh year we cannot sow and gather crop?”
The Sages tell us; whoever has food and asks what will we eat tomorrow, is of little faith. (Sota 48b) A person must trust that Hashem will provide his needs. If he has food he should not fear that he will not have in the future. A person should certainly be concerned about tomorrow but he should still put his trust in Hashem that he will provide his essential necessities.