Isaiah 63:8 (BSB)

For He said, “They are surely My people, sons who will not be disloyal.” So He became their Savior.

From Isaiah 63. Also in the ESV.

Commentary on Isaiah 63:8

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Isaiah 63:7-14: The prophet is here, in the name of the church, taking a review, and making a thankful recognition, of God's dealings with his church all along, ever since he founded it, before he comes, in the latter end of this chapter and in the next, as a watchman upon the walls, earnestly to pray to God for his compassion towards her in her present deplorable...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Isaiah 63:8: For he said, surely they are my people,.... Not in common with the rest of mankind, being his creatures, and the care of his providence; but his special people, whom he had chosen to be such, and had made a covenant with; he had avouched them for his people, and they had avouched him to be the Lord their God; and this covenant interest was...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Isaiah 63:8: he--Jehovah "said," that is, thought, in choosing them as His covenant-people; so "said" (Psa 95:10). Not that God was ignorant that the Jews would not keep faith with Him; but God is here said, according to human modes of thought to say within Himself what He might naturally have expected, as the result of His goodness to the Jews; thus the enormity of their unnatural...
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on Isaiah 63:8: For he said, Surely they [are] my people, children [that] will not lie: so he was their Saviour. (h) For I chose them to be mine, that they should be holy, and not deceive my expectation.