'Household of God' in the Bible

Consequently, therefore, you are no longer strangers and foreigners, but you are fellow citizens of the saints and members of the household of God,

But if I am delayed, [I am writing] in order that you may know how one must conduct oneself in the household of God, which is the church of the living God, the pillar and mainstay of the truth.

For [it is] the time for the judgment to begin out from the household of God. But if [it begins] out from us first, what will be the outcome for those who are disobedient to the gospel of God?