Jeremiah 50:5 “They will ask for the way to Zion, turning their faces in its direction; they will come that they may join themselves to the LORD in an everlasting covenant that will not be forgotten.
Jeremiah is here prophesying of New Testament times, when the Jesus of Nazareth – the promised Messiah of Israel – came to do the great work of God. For this reason, it says in the New Testament [emphasis added, here and in the verses following]:
Hebrews 12:22 But you have come to Mount Zion and to the city of the living God, the heavenly Jerusalem, and to myriads of angels,
Hebrews 12:23 to the general assembly and church of the firstborn who are enrolled in heaven, and to God, the Judge of all, and to the spirits of the righteous made perfect,
Hebrews 12:24 and to Jesus, the mediator of a new covenant, and to the sprinkled blood, which speaks better than the blood of Abel.
In the following chapter of Hebrews this new covenant was called the “eternal covenant,” making even more clear to us the connection with Jeremiah 50:5:
Hebrews 13:20 Now the God of peace, who brought up from the dead the great Shepherd of the sheep through the blood of the eternal covenant, even Jesus our Lord,
As for being “joined to the Lord,” Paul uses this language in 1 Corinthians:
1 Corinthians 6:17 But the one who joins himself to the Lord is one spirit with Him.
Let us therefore rejoice over the fulfillment of what God spoke through His prophet Jeremiah! And let us glory that this covenant has not been forgotten, just as Jeremiah said!
Scripture quotations taken from the NASB, unless otherwise noted.