Kir Hareseth, also called Mizpah, was a town east of the Dead Sea in Moab, where modern-day Jordan can be found.
There was also a region called Mizpah.
After Jacob got fed up with Rachel's father Laban stringing him along, he left Paddan Aram but Laban caught up with him in Moab in Genesis 31:43-49:
43. Laban answered Jacob, "The women are my daughters, the children are my children, and the flocks are my flocks. All you see is mine. Yet what can I do today about these daughters of mine, or about the children they have borne?
44. Come now, let's make a covenant, you and I, and let it serve as a witness between us."
45. So Jacob took a stone and set it up as a pillar.
46. He said to his relatives, "Gather some stones." So they took stones and piled them in a heap, and they ate there by the heap.
47. Laban called it Jegar Sahadutha, and Jacob called it Galeed.
48. Laban said, "This heap is a witness between you and me today." That is why it was called Galeed.
49. It was also called Mizpah, because he said, "May the LORD keep watch between you and me when we are away from each other.
Joshua 11 verse 3 stated a region called Mizpah and the Valley of Mizpah appeared in verse 8. In Joshua 15, Mizpah had become part of the inheritance of the tribe of Judah, but it was granted to the tribe of Benjamin in Joshua 18.
Because of the wickedness of the Benjamites, retribution against them was waged by the other tribes of Israel (Jacob) in Judges 10 and 11 when the tribes assembled in Mizpah against them.
Samuel subdued the Philistines at Mizpah in 1 Samuel 7 then crowned Saul king at Mizpah in 1 Samuel 10. When king Saul became jealous of David and started trying to kill him, David arranged to keep his parents safe in Mizpah in 1 Samuel 22.
1 Kings 15:22 - King Asa reinforced Mizpah during the spate between the kingdoms of Israel and Judah
2 Kings 25:22-26 (after the fall of Jerusalem, also stated in 2 Chronicles 16):
22. Nebuchadnezzar king of Babylon appointed Gedaliah son of Ahikam, the son of Shaphan, to be over the people he had left behind in Judah.
23. When all the army officers and their men heard that the king of Babylon had appointed Gedaliah as governor, they came to Gedaliah at Mizpah--Ishmael son of Nethaniah, Johanan son of Kareah, Seraiah son of Tanhumeth the Netophathite, Jaazaniah the son of the Maacathite, and their men.
24. Gedaliah took an oath to reassure them and their men. "Do not be afraid of the Babylonian officials," he said. "Settle down in the land and serve the king of Babylon, and it will go well with you."
25. In the seventh month, however, Ishmael son of Nethaniah, the son of Elishama, who was of royal blood, came with ten men and assassinated Gedaliah and also the men of Judah and the Babylonians who were with him at Mizpah.
26. At this, all the people from the least to the greatest, together with the army officers, fled to Egypt for fear of the Babylonians.
In Jeremiah 40, the prophet Jeremiah was released from the exiles, then he went to Mizpah where the Babylonians set up Gedaliah as a puppet leader before he was assassinated.
Nehemiah 3:6-7,15-19 (people from Mizpah mentioned during the rebuilding of Jerusalem):
6. The Jeshanah Gate was repaired by Joiada son of Paseah and Meshullam son of Besodeiah. They laid its beams and put its doors and bolts and bars in place.
7. Next to them, repairs were made by men from Gibeon and Mizpah--Melatiah of Gibeon and Jadon of Meronoth--places under the authority of the governor of Trans-Euphrates.
...
15. The Fountain Gate was repaired by Shallun son of Col-Hozeh, ruler of the district of Mizpah. He rebuilt it, roofing it over and putting its doors and bolts and bars in place. He also repaired the wall of the Pool of Siloam, by the King's Garden, as far as the steps going down from the City of David.
16. Beyond him, Nehemiah son of Azbuk, ruler of a half-district of Beth Zur, made repairs up to a point opposite the tombs of David, as far as the artificial pool and the House of the Heroes.
17. Next to him, the repairs were made by the Levites under Rehum son of Bani. Beside him, Hashabiah, ruler of half the district of Keilah, carried out repairs for his district.
18. Next to him, the repairs were made by their countrymen under Binnui son of Henadad, ruler of the other half-district of Keilah.
19. Next to him, Ezer son of Jeshua, ruler of Mizpah, repaired another section, from a point facing the ascent to the armory as far as the angle.
2 Kings 3 described how the Moabites (descendants of Lot through his older daughter) were defeated after they revolted from Israel:
1. Joram son of Ahab became king of Israel in Samaria in the eighteenth year of Jehoshaphat king of Judah, and he reigned twelve years.
2. He did evil in the eyes of the LORD, but not as his father and mother had done. He got rid of the sacred stone of Baal that his father had made.
3. Nevertheless he clung to the sins of Jeroboam son of Nebat, which he had caused Israel to commit; he did not turn away from them.
4. Now Mesha king of Moab raised sheep, and he had to supply the king of Israel with a hundred thousand lambs and with the wool of a hundred thousand rams.
5. But after Ahab died, the king of Moab rebelled against the king of Israel.
6. So at that time King Joram set out from Samaria and mobilized all Israel.
...
21. Now all the Moabites had heard that the kings had come to fight against them; so every man, young and old, who could bear arms was called up and stationed on the border.
22. When they got up early in the morning, the sun was shining on the water. To the Moabites across the way, the water looked red--like blood.
23. "That's blood!" they said. "Those kings must have fought and slaughtered each other. Now to the plunder, Moab!"
24. But when the Moabites came to the camp of Israel, the Israelites rose up and fought them until they fled. And the Israelites invaded the land and slaughtered the Moabites.
25. They destroyed the towns, and each man threw a stone on every good field until it was covered. They stopped up all the springs and cut down every good tree.
Only Kir Hareseth was left with its stones in place, but men armed with slings surrounded it and attacked it as well.
2 prophecies against Moab both mentioned Kir Hareseth: Isaiah 16:6-11 & Jeremiah 48:29-36