What’s the scriptural basis for calling all people “God’s people”?

What’s the scriptural basis for calling all people “God’s people”?

By Jack Gillespie. "Well, of course, there aren’t any verses that come right out and say, “all people are now God’s people because of the work of Christ.” If there were, the conversation would be over. But I see it throughout the New Testament (and even suggested in the Old ...