Luke 13:35

“Behold, your house is left to you desolate, and I say to you, ‘You shall not see me, until you shall say, Blessed is he who comes in the name of the Lord.' ”

And the result of her rejection of Him could only result in the desolation of her house, either of the Temple or of the city (linguistic considerations might suggest ‘the city', that is, the people of the city, for it bears a pronominal suffix making it personal to the people). A desolated and forsaken people of Jerusalem would one day bear witness to their failure to receive Him (compare chapter Luke 21:20).

And now He was leaving them and they would not see Him again until they greeted Him with the words from Psalms 118:26, “Blessed is He who comes in the name of the Lord.” This may be referring to:

1). To the future visit on which they welcomed Him on His entry into Jerusalem with similar words to these (Luke 19:38). Although if so it would be sarcastic and cynical. But that is unlikely. Pilgrims were welcomed at every Passover with the same words. None would see that as momentous. Yet the momentous first half of the sentence requires an equally momentous second half.

2). It may be suggesting that the total desolation of every Jew as a result of what would happen to Jerusalem would only be remedied for those who turned from it to recognise their true Messiah, to ‘see Him' and to acknowledge Him. Then their house would no longer be desolate for they would see that in His rising again they had a new Temple (John 2:19) of which they could become a part (Ephesians 2:11).

3). Or it may be His way of pointing out that although Jerusalem may be desolated, it will yet be renewed, so that some of its inhabitants (Jewish, Arab and other Christians who live in Jerusalem) will welcome Him when He comes in His Messianic glory, as He has promised.

4). Most likely it may be declaring prophetically that one day Jerusalem would reluctantly have to admit what He is, in spite of their unbelief. Jerusalem might fail, but it would have to finally admit that the Messiah that it had rejected had not failed, because they would see Him coming in judgment and in glory (Revelation 1:7).