Rashi on Deuteronomy 28:66/רש"י על דברים כ״ח:ס״ו

1חייך תלאים לך THY LIFE SHALL HANG BEFORE THEE — because of uncertainty. — Anything that is uncertain may be termed תלוי (“hanging”); You will always be saying: “Perhaps I shall die to-day through the sword that is coming upon us”. — Our Rabbis interpreted this to refer to one who is obliged to buy produce in the market (who does not possess any of his own),

2ולא תאמין בחייך AND THOU SHALT HAVE NONE ASSURANCE OF THY LIFE — this they refer to one who must rely on the baker (cf. Menachot 103b).