Devarim 28:66

חייך 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), ולא 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).

וְהָי֣וּ חַיֶּ֔יךָ תְּלֻאִ֥ים לְךָ֖ מִנֶּ֑גֶד וּפָֽחַדְתָּ֙ לַ֣יְלָה וְיוֹמָ֔ם וְלֹ֥א תַאֲמִ֖ין בְּחַיֶּֽיךָ׃

and thy life shall hang in doubt before thee; and thou shalt fear day and night, and shalt have no assurance of thy life: