Hazrat Ibn Umar (may Allah be pleased with them both) narrates that the Noble Prophet (peace and blessings be upon him) once led the prayer of fear. One group stood with him and another group faced the enemy. The group present with him performed one rak‘ah, then went towards the enemy. Then the second group came and he led them in one rak‘ah. Afterwards, both groups made up one rak‘ah each. Hazrat Ibn Umar (may Allah be pleased with them both) says that if the fear of the enemy is even greater than this, then perform the prayer by gesture, standing or riding.