Lucas 7:22

And he answered, and said unto them, Go and tell John the things which ye have seen and heard; the blind receive their sight, the lame walk, the lepers are cleansed, and the deaf hear, the dead are raised up, the poor have good tidings preached to them. And blessed is he whosoever shall find no occasion of stumbling in me.

One passage which Jesus clearly had in mind was Isaiah 35:5, in which the prophet foretold the messianic age. Thus Jesus answered John plainly, but not too plainly, that he was indeed the Christ. The reason for Jesus' avoidance of a more dogmatic declaration concerning himself at that time was to deny on his own behalf the malignant, carnal notions of Messiah's true character which had perverted the popular mind of that day. For more on this, see my Commentary on Matthew, Matthew 11:1-3.

The dead are raised up ... has reference to a plurality of resurrections; and here is proof that not all such wonders have been recorded by the sacred authors. Long after the synoptic Gospels were written, John recorded the raising of Lazarus; and there may have been many others whom the Lord raised to life from the dead.

Blessed is he ... The clause introduced by these words shows that Jesus expected John to continue in faith; and the passage immediately afterward indicates that Jesus knew he would continue.