Nehemiah

Rebuilding the walls of Jerusalem:

So we rebuilt the wall till all of it reached half its height, for the people worked with all their heart. Neh 4:6

So the wall was completed on the twenty-fifth of Elul, in fifty-two days. When all our enemies heard about this, all the surrounding nations were afraid and lost their self-confidence, because they realized that this work had been done with the help of our God. Neh 6:15-16

I find it really amazing how God can get so many individuals to work together to achieve his purposes. That's what I call power!