And when he was alone, they that were about him with the twelve asked of him the parable. They that were about him - None of the other evangelists intimate that there were any besides the twelve with him: but it appears there were several others present; and though they were not styled disciples, yet they appear to have seriously attended to his public and private instructions.
Related Commentaries of Mark 4:10
Mark 4:10
10 And when he was alone, they that were about him with the twelve asked of him the parable.