Jeremiah 31:39

39 The measuring line will stretch from there straight to the hill of Gareb and then turn to Goah.

Read Jeremiah 31:39 Using Other Translations

And the measuring line shall yet go forth over against it upon the hill Gareb, and shall compass about to Goath.
And the measuring line shall go out farther, straight to the hill Gareb, and shall then turn to Goah.
A measuring line will be stretched out over the hill of Gareb and across to Goah.

What does Jeremiah 31:39 mean?

John Gill's Exposition of the Bible
Jeremiah 31:39

And the measuring line shall yet go forth over against it,
&c.] Or, "before it" F16; the gate proceeding right on from it; of the length of the measuring line, or reed; see ( Ezekiel 40:5 ) ; though some render it, "before him" F17; before the Lord, under whose direction and powerful providence the work went on; so the city gates and walls of the New Jerusalem are said to be measured with a reed, ( Revelation 21:15 ) ; upon the hill Gareb;
which signifies a "scab", so called, as is supposed, from scabby and leprous persons sent here to dwell, which was a "lazaretto" for them. Lightfoot, following Lyra, takes it to be the same with Mount Calvary: it was on the north side of the city, bending to the west; and, if the same with Calvary, it was on the west side. The Targum renders it,

``the hill which was near to Gareb:''
and shall compass about to Goath;
so called perhaps from the difficulty of its ascent, it being a laborious work to go up to it, enough to make a man breathe. Lyra takes it to be Golgotha, which is not very likely; it seems to be at some distance from the former; since from that there was a round about, a compass fetched to this: it is supposed to lie on the west side of the city, towards the south. The Targum renders it the calves' pool, or the round pool; it is thought by some more likely to be the hill Josephus F18 speaks of, that hung over the valley of Siloam.
FOOTNOTES:

F16 (wdgn) "ante ipsam", Tigurine version, Gataker
F17 "Coram eo", Pagninus, Montanus; "coram ipso", Calvin.
F18 De Bello Jud. l. 5. c. 12. sect. 2.
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