Early in the morning. — Probably at day-break, when the worshippers would be going up to the Temple for their early devotions, or, though less probable, at the third hour, the time of the morning sacrifice.
They that were with him. — Probably those named in Acts 4:6, who seem to have acted as a kind of cabinet or committee.
All the senate.... — Literally the word means, like senate, the assembly of old men, or elders. They are here distinguished from the Sanhedrin, which itself included elders, in the official sense of the word, and were probably a body of assessors — how chosen we do not know — specially qualified by age and experience, called in on special occasions. They may have been identical with the “whole estate of the elders” of Acts 22:5.