Whom the heaven must receive until the times of restitution of all things, which God hath spoken by the mouth of all his holy prophets since the world began.
Berean Study Bible (BSB) - Acts 3:21 >Heaven must take Him in until the time comes for the restoration of all things, which God announced long ago through His holy prophets.
Textus Receptus (TR) - Acts 3:21 >ὃν δεῖ οὐρανὸν μὲν δέξασθαι ἄχρι χρόνων ἀποκαταστάσεως πάντων, ὧν ἐλάλησεν ὁ Θεὸς διὰ στόματος πάντων ἁγίων αὐτοῦ προφητῶν ἀπ᾿ αἰῶνος.