וַיִּשְׁלְח֥וּ אֵלַ֛י כַּדָּבָ֥ר הַזֶּ֖ה אַרְבַּ֣ע פְּעָמִ֑ים וָאָשִׁ֥יב אוֹתָ֖ם כַּדָּבָ֥ר הַזֶּֽה׃ (ס)
And they sent unto me four times after this sort; and I answered them after the same manner.
Read midrashic interpretation of Nehemiah 6:4: and classical rabbinic exegesis.