Read Hebrews 3:6 Using Other Translations
But Christ as a son over his own house; whose house are we, if we hold fast the confidence and the rejoicing of the hope firm unto the end.
but Christ is faithful over God's house as a son. And we are his house if indeed we hold fast our confidence and our boasting in our hope.
But Christ, as the Son, is in charge of God’s entire house. And we are God’s house, if we keep our courage and remain confident in our hope in Christ.