Judges 9:33-35

33In the morning at sunrise, advance against the city. When Gaal and his men come out against you, seize the opportunity to attack them.”

34So Abimelek and all his troops set out by night and took up concealed positions near Shechem in four companies.

35Now Gaal son of Ebed had gone out and was standing at the entrance of the city gate just as Abimelek and his troops came out from their hiding place.