The question raised is about the restoration of the kingdom to Israel. The disciples knew the promises given through the prophets about this restoration (Isaiah 9:6–7; Jeremiah 33:15–17; Ezekiel 37:24–27; Ezekiel 36:24–28). These promises speak of peace, justice, love, forgiveness of sins, mercy, and faithfulness.
6 So when they had come together, they asked him, “Lord, will you at this time restore the kingdom to Israel?”