Luke 13:24 Strive to enter in at the strait gate: for many, I say unto you, will seek to enter in, and shall not be able.
25 When once the master of the house is risen up, and hath shut to the door, and ye begin to stand without, and to knock at the door, saying, Lord, Lord, open unto us; and he shall answer and say unto you, I know you not whence ye are:
Men say that God would not shut the door (contrary to the Scripture above) and men say that God would not allow time to continue without salvation available (again contrary to the Scripture above which tells us of those that are standing without and knocking at the door beseeching to be let in). Men say that God will always save while time continues on the earth.
Yet Jesus responds to those knocking AFTER the door has been shut by saying, "I know you not whence ye are".
And then adds,
"...I know you not whence ye are:
26 Then shall ye begin to say, We have eaten and drunk in thy presence, and thou hast taught in our streets.
27 But he shall say, I tell you, I know you not whence ye are; depart from me, all ye workers of iniquity."
Twice it is said, "I know ye not WHENCE ye are". Why does Jesus use this particular language?
The reason is because the elect were all saved and came out of Great Tribulation at the conclusion of that little season.
Revelation 7:9 After this I beheld, and, lo, a great multitude, ...
When this great multitude appears the question is asked:
Revelation 7:13 And one of the elders answered, saying unto me, What are these which are arrayed in white robes? and whence came they?"
And the response is given:
Revelation 7:14 And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb."
Whence came they? The firstfruits came out of the Church Age. The final fruits came out of the Great Tribulation. The last ones to be saved are all accounted for.
Therefore, once the door to heaven has been shut, and it was shut on May 21, 2011, at the conclusion of the Great Tribulation, all to be saved were saved.
Yet, in these days after that tribulation we have people continuing to teach (erroneously) that salvation is still possible. They are encouraging people to go to the door of heaven and knock and beseech God to let you in: "Lord, Lord, open to us".
The Lord though knows He has no additional gospel program. He has no further fruits to bring in. Therefore the statement is made: "I know you not WHENCE ye are, depart from Me all ye workers of iniquity." They are not part of God's first fruits harvest. Nor are they part of God's final harvest of ingathering during the Great Tribulation period. Whence came they? What other harvest is there? What other time of bringing in fruits exists? The Bible's answer is that there is no additional harvest. No other time for fruits. "I know you not whence ye are".
All today that are involved in encouraging people in regards to approaching God for salvation are involved in a false proclamation of the gospel which is actively being rejected by Christ at the door of heaven.
In Luke 13's passage once the door was shut by God He never again opened it up. The pleas of many seeking to enter in did not change the status of the door in the slightest way.
Revelation 3:7 ... These things saith he that is holy, he that is true, he that hath the key of David, he that openeth, and no man shutteth; and shutteth, and no man openeth;