Luke 9:1 gives the authority to heal — in verse 6 that authority is put into action.

Luke 9:2 commands preaching and healing — verse 6 reports the disciples carrying out that command.

Mark 6:12 directly parallels this: 'They went out and preached that people should repent.'

Mark 6:13 adds detail: they drove out demons and healed with oil, matching the healing in Luke 9:6.

Matthew 10:7 records Jesus' specific instruction to preach 'the kingdom of heaven is at hand' — the message the apostles proclaimed in Luke 9:6.