Answer:
No one knew or understood that Jesus' seven year ministry was to be split in two, but Christ, Himself.
And the only passage of explanation He quoted to reveal it was to those in His hometown of Nazareth on the Sabbath day [as His custom was - verse 16] in church, where He was handed the scroll of Isaiah:
"...And when He had opened the book, He found the place where it was written, The Spirit of the Lord is upon Me, because He hath anointed Me to preach the gospel to the poor; He hath sent Me to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind, to set at liberty them that are bruised, to preach the acceptable year of the Lord. AND HE CLOSED THE BOOK." (Luke 4:17-20)
He stopped reading at that point in Isaiah's prophecy, because the very next words revealed the "SECOND PHASE" of Jesus' ministry when He comes back the "second time":
"...and the DAY OF VENGEANCE OF OUR GOD..." (Isa.61:2).
The setting right of the vile way things are being done on the earth. To destroy man's governments... and establish the Kingdom of God, peace and justice.
Jesus stopped short of this second phase of His ministry that was cryptically written by the inspired Isaiah... and told those Jews in church with Him:
"...THIS DAY IS THIS SCRIPTURE FULFILLED IN YOUR EARS." (Luke 4:21)
The first phase... the prophecy of Christ's "first coming" was being fulfilled, then.
Those Jews were flabergasted.
They never suspected this passage about the Lord's restoration of Israel, peace, prosperity and the Kingdom to the region, to be a "two-part" operation by a "local boy." They surely never imagined that their hometown "carpenter's son" would grow up to be the Messiah for whom all of Judaea was looking.
Yet, there He was... claiming to be the Messiah, fulfilling prophecy before their unbelieving eyes [unmindful of where He'd stopped reading... and caring even less].
Words were exchanged... arguments broke out... mayhem ensued... the church service became severely disrupted:
"...all in the synagogue, when they heard these things, were FILLED WITH WRATH, and ROSE UP, and THRUST HIM OUT OF THE CITY, and LED HIM UNTO THE BROW OF THE HILL WHEREON THEIR CITY WAS BUILT, THAT THEY MIGHT CAST HIM DOWN HEADLONG. But He passing through the midst of them went His way." (verses 28-30)
Isaiah 61 was the only scripture Jesus quoted, regarding His "first coming"... or of the "first phase" of His commission to other than His disciples -- and they didn't get it at first, either. The Jews to whom He revealed it... who grew up with and were taught by the scriptures... remained clueless to the hidden fact that the Messiah would conduct His seven year ministry in two phases.
Nor did they suspect that they would try to kill Him several times before they finally succeeded one Passover afternoon.
The one passage Jesus quoted regarding His "first coming" was cloaked in a prophecy, of which most of the world remains unaware today. Therefore does it remain equally unaware of the "second phase": "the Day of Vengeance of our God" that's coming.
Beyond this sole revelation by Christ, Himself, that resulted in an untimely attempt on His life... there are no scriptures that say "first coming."