הָֽיְתָה־לִּ֬י דִמְעָתִ֣י לֶ֭חֶם יוֹמָ֣ם וָלָ֑יְלָה בֶּאֱמֹ֥ר אֵלַ֥י כָּל־הַ֝יּ֗וֹם אַיֵּ֥ה אֱלֹהֶֽיךָ׃
我晝夜以眼淚當飯；人終日對我說：«你的上帝在哪裡呢？»
Rashi
My tears were my bread From here we derive that distress satiates a person, and he does not seek to eat. Similarly, Scripture states regarding Hannah (I Sam. 1:7): “and she wept and did not eat.”