Jeremiah 31:1

At that future time, namely, the eschatological future (cf. Jeremiah 30:24), the Lord would establish an intimate relationship between Himself and all the families of His people (cf. Jeremiah 31:33; Genesis 17:7; Zechariah 12:10-14). He would finally achieve what His people had always frustrated by their sins.

This verse concludes the material in chapter 30 and serves as a heading for chapter 31. All of chapter 31 describes the national restoration of Israel. This is verse 25 chapter 30 in the Masoretic Hebrew Bible, and Jeremiah 31:2 begins the next chapter.