Sir K, you are not dealing with vv13, 14; your desire is to jump ahead to v15, and lump everyone mentioned into the “those days,” or the “this or that time,” with which v15 opens.
The time of v15 is somewhere within a 10 period of time; we are not told on what day in that 10 day period this meeting ocurred.**Acts 1:15****At this time Peter stood up in the midst of the brethren (a gathering of about one hundred and twenty persons was there together), and said,**At whatever time Peter addressed the group, both the time, and the group are unspecified, except that in v15, he addresses the group as “Men, brothers, or brethren;” the other 11, the women, Mary, and His brothers, are not specifically mentioned, as they were in vv13,14.
D.A. Carson, in his New Bible Commentary, 21st Century, makes this comment on v15:The number a hundred and twenty here is more than just a round number. This is the smallest number in Jewish tradition for a population that could have its own ‘council’. There was a tradition that each judge should rule or represent at least ten members. It may be, therefore, that Luke is suggesting the young church was already a community in its own right and that a twelfth ‘leader’ was required.IOW, the church, based upon the 120, could have been at least 1200 strong, at that time.
Returning to vv13,14, if you are insisting that the ”His brothers” in v14, means ”brothers in Christ,", then why is Luke not including those specifically named in v13, as “His brothers?”
IOW, in the phrasing of v14, isn’t Luke saying, in esssence, that those mentioned in v13 are
not “His brothers?” It seems important to Luke to make that distinction; wouldn’t you agree?