The First Coming was the Beginning of the Gathering:

Jesus Sends His Disciple to Gather the Lost Sheep of Israel
(Ephraim)

Jesus came to bring the lost house of Israel unto Himself. He even commanded His disciples to do the same thing. His coming was the beginning of the Father’s plan to bring the two kingdoms together under the reign of the everlasting King.

John 10:14-16
His sheep will know Him. He was talking to the House of Judah. He told them He not only was sent to them, He was also sent to bring those sheep, which were not of this fold. This fold was Ephraim. They will hear His voice and the two folds will become one with on Shepherd.
1.) John 10:19-31
The Jews were upset at Jesus’ words, confirming that there were others than the Jews, that He must go and retrieve for the Father. In fact, they were so upset that when He reiterated the fact that His sheep hear His voice (which they were not hearing nor believing His voice) they began to pick up rocks to stone Him.

John 17:20-23
Once again Jesus is desiring those who are His to become one. He not only prays for those who are present. But, He also prays for those who will hear the word given by those who are present with Him. The world will know the love God has for His children.

John 11:49-54
God is gathering together two nations or two kingdoms, by the death of one man. The two nations will become one.

Matthew 10:5-7
The disciples were to go to the lost sheep of Israel.
1.) Matthew 15:22-28

Acts 1:6-8
The disciples asked Jesus if He was going to restore the two kingdoms as the prophets had foretold. And they wanted to know if it was going to be at the present time. Jesus replied to them don’t worry about the time, instead go and witness to all the world. He told them to go gather or witness to all the children of God. This would obviously have to take place before the two kingdoms could be reunited, because God had scattered them throughout all the earth.