And again, Esaias saith, There shall be a root of Jesse, and he that shall rise to reign over the Gentiles; in him shall the Gentiles trust.

People's New Testament

15:12 Esaias saith. The quotation that follows is from Isa 11:10, a chapter which is throughout a prediction of Christ and his kingdom.

A root of Jesse. Jesse, the father of David, was an ancestor of Jesus (Mt 1:6 Lu 3:32).

In him shall the Gentiles trust. The passage quoted shows very clearly that Christ was to be the Savior of the Gentiles.

Wesley's Notes

15:12 There shall be the root of Jesse - That kings and the Messiah should spring from his house, was promised to Jesse before it was to David. In him shall the gentiles hope - Who before had been without hope, Eph 2:12. Isa 11:10

Jamieson-Fausset-Brown Bible Commentary

12. And again, Esaias saith-(Isa 11:10).

There shall be a-"the"

root of Jesse-meaning, not "He from whom Jesse sprang," but "He that is sprung from Jesse" (that is, Jesse's son David)-see Re 22:16.

and he that shall rise, &c.-So the Septuagint in substantial, though not verbal, agreement with the original.

Matthew Henry's Concise Commentary

15:8-13 Christ fulfilled the prophecies and promises relating to the Jews, and the Gentile converts could have no excuse for despising them. The Gentiles, being brought into the church, are companions in patience and tribulation. They should praise God. Calling upon all the nations to praise the Lord, shows that they shall have knowledge of him. We shall never seek to Christ till we trust in him. And the whole plan of redemption is suited to reconcile us to one another, as well as to our gracious God, so that an abiding hope of eternal life, through the sanctifying and comforting power of the Holy Spirit, may be attained. Our own power will never reach this; therefore where this hope is, and is abounding, the blessed Spirit must have all the glory. All joy and peace; all sorts of true joy and peace, so as to suppress doubts and fears, through the powerful working of the Holy Spirit.