Jesus' family
Jesus‘ family wanted to take Jesus away from the crowd. They thought that he was crazy (Mark 3:21). But nothing crazy was happening. The crowds were sitting quietly round Jesus. And Jesus was teaching them about the Bible.
People told Jesus that his family had come. Jesus replied that, really, he was already with his family. The crowds included people who, like Jesus, wanted to obey God. Those people belong to the family of God. So they were really Jesus‘ family.