The Apostle Paul
Romans 15:12BSB·traditional attribution

And once more, Isaiah says: “The Root of Jesse will appear, One who will arise to rule over the Gentiles; in Him the Gentiles will put their hope.”

John Calvin Reformed @genevareformer

12. And again, Isaiah, etc., This prophecy is the most illustrious of them all: for in that passage, the Prophet, when things were almost past hope, comforted the small remnant of the faithful, even by this, — that there would arise a shoot from the dry and the dying trunk of David’s family, and that a branch would flourish from his despised root, which would...

Matthew Henry Presbyterian @wholebiblehenry

The apostle here returns to his exhortation to Christians. What he says here (Rom 15:7) is to the same purport with the former; but the repetition shows how much the apostle's heart was upon it. "Receive one another into your affection, into your communion, and into your common conversation, as there is occasion." He had exhorted the strong to receive the weak (Rom 14:1), here...

Commenting on Romans 15:7-12

John Gill Reformed Baptist @doctorgill

Now the God of hope,.... This character is taken from the latter part of Rom 15:12, and is occasioned by it, "in him shall the Gentiles trust", or "hope"; and is proper to God as he is the author and giver of this grace; for naturally men are without it; that which is a good hope is the gift of God, and through his grace...