Matthew 23:39 - Ellicott's Commentary On The Whole Bible

Till ye shall say. — There is obviously a reference to the fact that the words quoted from Psalms 118:26, had been uttered by the crowd but a few days before on His solemn entry into Jerusalem. Not till those words should be uttered once again — not in a momentary burst of excitement, not with feigned Hosannas, but in spirit and in truth — would they look on Him as they looked now. There can be little doubt that our Lord points to the second Advent, and to the welcome that will then be given Him by all the true Israel of God. For that generation, and for the outward Israel as such, the abandonment was final.