A.T. Robertson Commentary Luke 9:1

"And he called the twelve together, and gave them power and authority over all demons, and to cure diseases." — Luke 9:1 (ASV)

He called the twelve together (συνκαλεσαμενος τους δωδεκα). Mr 6:7; Matthew 10:1 have προσκαλεωμα, to call to him. Both the indirect middle voice.