Hebrews 10:30

“For we know him that hath said, etc..] That is, God, whom the apostle and the Hebrews knew; not merely by the works of creation and providence, but by the Scriptures, which they were favoured with, and by which they were distinguished from the Gentiles, and by which they knew his being, nature, and perfections; particularly, that what he said he was able to perform, and that he was true and faithful to every word of his, and to what he has said, (<053235>Deuteronomy 32:35) vengeance [belongeth] unto me, I will recompence, saith the Lord. Vengeance belongs to God, not as to the affection, as if there was any such passion in him; but as to the effect, there being that produced by him, which…”

“him--God, who enters no empty threats. Vengeance belongeth unto me--Greek, "To Me belongeth vengeance": exactly according with Paul's quotation, Rom 12:19, of the same text. Lord shall judge his people--in grace, or else anger, according as each deserves: here, "judge," so as to punish the reprobate apostate; there, "judge," so as to interpose in behalf of, and save His people (Deu 32:36).”

“For we know him that hath said - We know who has said this - God. They knew this because it was recorded in their own sacred books. Vengeance belongeth unto me ... - This is found in Deuteronomy 32:35; see it explained in the notes on Romans 12:19. It is there quoted to show that we should not avenge ourselves; it is here quoted to show that God will certainly inflict punishment on those who deserve it. If any should apostatize in the manner here referred to by the apostle, they would, says he, be guilty of great and unparalleled wickedness, and would have the certainty that they must meet the wrath of God. And again, The Lord shall judge his people - This is quoted from Deuteronomy 32:36.…”

“The Lord will judge his people - Yea, far more rigorously than the heathens, if they rebel against him. Deu 32:35, &c. Hebrews 10:31”

“10:30-31 “The Lord will judge his own people”: Deut 32:36; cp. 1 Pet 4:17-18. • That God will pay them back and will judge his own people shows the dreadful circumstances of those who have rejected Christ. Once God moves to judge a person, no one can rescue that person out of God’s hand (Deut 32:39).”

“Vengeance: Deu 32:35; Psa 94:1; Isa 59:17, Isa 61:2, Isa 63:4; Nah 1:2; Rom 12:19, Rom 13:4 The Lord shall: Deu 32:36; Psa 50:4, Psa 96:13, Psa 98:9, Psa 135:14; Eze 18:30, Eze 34:17; Co2 5:10 Hebrews 10:31”