Mercy on Jacob
Isa 14:1 For the LORD will have mercy on Jacob, and will yet choose Israel, and set them in their own land: and the strangers shall be joined with them, and they shall cleave to the house of Jacob.
Israel had been punished by God and taken captive by Babylon, but at the end of this 70 year captivity, Israel would be in their own land; God had not forgotten His covenant with them.
Dan 9:2 In the first year of his reign I Daniel understood by books the number of the years, whereof the word of the LORD came to Jeremiah the prophet, that he would accomplish seventy years in the desolations of Jerusalem.
Dan 9:3 And I set my face unto the Lord God, to seek by prayer and supplications, with fasting, and sackcloth, and ashes:
Dan 9:4 And I prayed unto the LORD my God, and made my confession, and said, O Lord, the great and dreadful God, keeping the covenant and mercy to them that love him, and to them that keep his commandments;
God kept his promise through Ezra and Nehemiah.
And the strangers shall be joined with them, and they shall cleave to the house of Jacob.
Gentiles would be coming to receive of the covenant. This would especially be true after Jesus came with the new covenant.
Isa 60:1 Arise, shine; for thy light is come, and the glory of the LORD is risen upon thee.
Isa 60:2 For, behold, the darkness shall cover the earth, and gross darkness the people: but the LORD shall arise upon thee, and his glory shall be seen upon thee.
Isa 60:3 And the Gentiles shall come to thy light, and kings to the brightness of thy rising.
Isa 14:2 And the people shall take them, and bring them to their place: and the house of Israel shall possess them in the land of the LORD for servants and handmaids: and they shall take them captives, whose captives they were; and they shall rule over their oppressors.
All will be servants under the new covenant, they would no longer be enemies. They would be under the apostles.
Mark 10:42 But Jesus called them to him, and saith unto them, Ye know that they which are accounted to rule over the Gentiles exercise lordship over them; and their great ones exercise authority upon them.
Mark 10:43 But so shall it not be among you: but whosoever will be great among you, shall be your minister:
Mark 10:44 And whosoever of you will be the chiefest, shall be servant of all.
Mark 10:45 For even the Son of man came not to be ministered unto, but to minister, and to give his life a ransom for many.
Eph 2:19 Now therefore ye are no more strangers and foreigners, but fellowcitizens with the saints, and of the household of God;
Eph 2:20 And are built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief corner stone;
Eph 2:21 In whom all the building fitly framed together groweth unto an holy temple in the Lord:
Eph 2:22 In whom ye also are builded together for an habitation of God through the Spirit.