1 Chronicles — Chapter 18

And Abisai the son of Sarvia slew of the Edomites in the valley of the saltpits eighteen thousand. Lapide cites Adrichomius: \"The Valley of Salt, in which David smote 18,000 Edomites, and returning erected a triumphal arch. There also Joab destroyed 12,000, and Amasias 10,000 or 20,000, and precipitated another 10,000 from the rock Jecteel.\" That valley was thus fatal to Edom across generations — a pattern of divine justice.