Judges 9:30-34

When Zebul the leader of the city heard the words of Gaal the son of Ebed, his anger burned.

So using deception, he successfully sent messengers to Abimelech, saying, “Behold, Gaal the son of Ebed and his relatives have come to Shechem; and behold, they are stirring up the city against you.

So now, arise by night, you and the people who are with you, and lie in wait in the field.

Then in the morning, as soon as the sun is up, you shall rise early and attack the city; and behold, when he and the people who are with him come out against you, you shall do to them whatever you can.”

So Abimelech and all the people who were with him got up at night, and lay in wait against Shechem, in four units.