'Surprise' in the Bible

But Jeroboam had put some of his men to make a surprise attack on them from the back, so some were facing Judah and others were stationed secretly at their back.

And at the first notes of song and praise the Lord sent a surprise attack against the children of Ammon and Moab and the people of Mount Seir, who had come against Judah; and they were overcome.

When the army of Judah arrived at the remotest watchtower in the wilderness, they looked around at the invasion force, and to their surprise, there were dead bodies lying all around on the ground not one had escaped!