Nehemiah 4:2-3

2And 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?”

3Now 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.”