Mark 3:15

15 and to have authority to expel demons:

Mark 3:15 Meaning and Commentary

Mark 3:15

And to have power to heal sicknesses
All manner of corporeal diseases that attend men and women:

and to cast out devils;
from such who were possessed with them: that is, he chose and appointed them to be his apostles, with a view of conferring such powers upon them hereafter; for as yet, they were not vested with them, nor sent out to exercise them; no, not till near twelve months after.

Mark 3:15 In-Context

13 Then he went up into the hill country and summoned to himself those he wanted, and they came to him.

14 He appointed twelve to be with him, to be sent out to preach

15 and to have authority to expel demons:

16 Shim`on, to whom he gave another name, "Kefa";

17 Ya`akov Ben-Zavdai and Yochanan, Ya`akov's brother -- to them he gave the name "B'nei-Regesh" (that is, "Thunderers");