Charles Spurgeon Commentary Nehemiah 4:3

"Now Tobiah the Ammonite was by him, and he said, Even that which they are building, if a fox go up, he shall break down their stone wall." — Nehemiah 4:3 (ASV)

A man like Sanballat never lacks friends. If there is a bad man anywhere, there is sure to be another close by. The devil does not make a fire with one stick. When he has set the first one alight, he can generally find another stick to put near it. Tobiah the Ammonite, who was tarred with the same brush as Sanballat the Horonite, was with him.