to ambush · to lie in wait for · to lie low · ambush

Jiang Feng escaped and afterwards Yuenu gave birth to two boys, but the 12 zodiacs had been lying in wait and ambushed them. Suddenly two princesses from Yihua Palace appeared. They made Yuenu kill herself, and shortly after, Jiang Feng committed suicide.

We've just received intelligence that the enemy is waiting in ambush two miles down the road.