Nehemiah 4:1-3

But it so happened, when Sanballat heard that we were rebuilding the wall, that he was furious and very indignant, and mocked the Jews. And he spoke before his brethren and the army of Samaria, and said, “What are these feeble Jews doing? Will they fortify themselves? Will they offer sacrifices? Will they complete it in a day? Will they revive the stones from the heaps of rubbish—stones that are burned?” Now Tobiah the Ammonite was beside him, and he said, “Whatever they build, if even a fox goes up on it, he will break down their stone wall.”