They shall ask the way to Zion with their faces thitherward, saying, Come, and let us join ourselves to the LORD in a perpetual covenant that shall not be forgotten.
They shall ask the way to Zion, with their faces thereward - rather, hitherward, Jeremiah's prophetic standpoint being at Zion. 'Their faces hitherward' implies their stedfastness of purpose, not to be turned aside by any difficulties on the way.
Let us join ourselves to the Lord in a perpetual covenant - in contrast to the old covenant, "which they brake" (Jeremiah 31:31, etc.; Jeremiah 32:40). They shall return to their God first, then to their own land.