And it shall be said in that day, Lo, this is our God; we have waited for him, and he will save us: this is the LORD; we have waited for him, we will be glad and rejoice in his salvation.
Lo, this is our God. 'After death has been swallowed up for ever, the people of God, who have been delivered from the hand of death, shall say to the Lord, Lo, this is our God, whom unbelievers regarded as only a man' (Jerome).
He will save us. 'The words are so moulded as to point us specially to the person of the Son of God, who "saves" us: as He vouchsafed to Israel temoral saving, so to His elect He appears for the purpose of conferring eternal salvation' Vitringa). Salvation was bought in title by the first coming of Christ: "unto them that look for Him shall He appear the second time without sin unto salvation" (Hebrews 9:28), then to be perfected in the bodies as well as the souls of His people (cf. Psalms 118:15). The Jews, however, have a special share in the words, This is our God (note, Isaiah 25:6).
In that day ... we will be glad and rejoice in his salvation - cf. Psalms 118:24, which refers to the second coming of Jesus (cf. Psalms 118:26 with Luke 13:35). "Waited" is characteristic of God's people in all ages (Genesis 49:18; Titus 2:13).