Ezra 4:14 Midrash

כְּעַ֗ן כָּל־קֳבֵל֙ דִּֽי־מְלַ֤ח הֵֽיכְלָא֙ מְלַ֔חְנָא וְעַרְוַ֣ת מַלְכָּ֔א לָ֥א אֲ‍ֽרִֽיךְ לַ֖נָא לְמֶֽחֱזֵ֑א עַ֨ל־דְּנָ֔ה שְׁלַ֖חְנָא וְהוֹדַ֥עְנָא לְמַלְכָּֽא׃

Now because we eat the salt of the palace, and it is not meet for us to see the king’s dishonour, therefore have we sent and announced to the king,

Read midrashic interpretation of Ezra 4:14: and classical rabbinic exegesis.