Nehemiah 4:5 (KJV)

But it came to pass, that when Sanballat heard that we builded the wall, he was wroth, and took great indignation, and mocked the Jews.

And he spake before his brethren and the army of Samaria, and said, What do these feeble Jews? will they fortify themselves? will they sacrifice? will they make an end in a day? will they revive the stones out of the heaps of the rubbish which are burned?

Now Tobiah the Ammonite was by him, and he said, Even that which they build, if a fox go up, he shall even break down their stone wall.

Hear, O our God; for we are despised: and turn their reproach upon their own head, and give them for a prey in the land of captivity:

So built we the wall; and all the wall was joined together unto the half thereof: for the people had a mind to work.

But it came to pass, that when Sanballat, and Tobiah, and the Arabians, and the Ammonites, and the Ashdodites, heard that the walls of Jerusalem were made up, and that the breaches began to be stopped, then they were very wroth,

And conspired all of them together to come and to fight against Jerusalem, and to hinder it.

Nevertheless we made our prayer unto our God, and set a watch against them day and night, because of them.

And Judah said, The strength of the bearers of burdens is decayed, and there is much rubbish; so that we are not able to build the wall.