Acts 3:21

ὃν δεῖ οὐρανὸν μὲν δέξασθαι ἄχρι χρόνων ἀποκαταστάσεως πάντων, ὧν ἐλάλησεν ὁ Θεὸς διὰ στόματος πάντων τῶν ἁγίων αὐτοῦ προφητῶν ἀπ᾽ αἰῶνος.

RBT Greek Interlinear:

Strongs 3739; hon; ὃν; which/whichever; RelPro-AMS

Strongs 1163; dei; δεῖ; must; V-PIA-3S

Strongs 3772; ouranon; οὐρανὸν; a heaven; N-AMS

Strongs 3303; men; μὲν; indeed; Prtcl

Strongs 1209; dexasthai; δέξασθαι; to take; V-ANM

Strongs 891; achri; ἄχρι; until; Prep

Strongs 5550; chronōn; χρόνων; times; N-GMP

Strongs 605; apokatastaseōs; ἀποκαταστάσεως; a reconstitution; N-GFS

Strongs 3956; pantōn; πάντων; all; Adj-GNP

Strongs 3739; hōn; ὧν; which/who; RelPro-GNP

Strongs 2980; elalēsen; ἐλάλησεν; chattered; V-AIA-3S

Strongs 3588; ho; ὁ; the; Art-NMS

Strongs 2316; Theos; Θεὸς; God; N-NMS

Strongs 1223; dia; διὰ; across; Prep

Strongs 4750; stomatos; στόματος; mouth; N-GNS

Strongs 3588; tōn; τῶν; the; Art-GMP

Strongs 40; hagiōn; ἁγίων; Holy Ones; Adj-GMP

Strongs 575; ap’; ἀπ’; away from; Prep

Strongs 165; aiōnos; αἰῶνος; eternal; N-GMS

Strongs 846; autou; αὐτοῦ; himself; PPro-GM3S

Strongs 4396; prophētōn; προφητῶν; prophets; N-GMP

RBT Translation:

ἀποκατάστασις - reconstitution, recovery

him whom it is necessary indeed for a heavenly one to hand-receive until chronological times of a reconstitution of everything which the God uttered straight through a mouth of the Holy Ones away from eternal (aiōn) prophets of himself.

Julia Smith Literal 1876 Translation:
Whom heaven must truly receive till time of restoration of all which God spake by the mouth of all his holy prophets from forever.

LITV Translation:
whom Heaven truly needs to receive until the times of restoration of all things, of which God spoke through the mouth of all His holy prophets from the age past.