James C. Moyer discusses the use of "sickle swords" (scimitars) in preexilic Israel.
James C. Moyer, “Weapons,” in Eerdmans Dictionary of the Bible, ed. David Noel Freedman, Allen C. Myers, and Astrid B. Beck (Grand Rapids, MI: Eerdmans, 2000), 1371–1372 (Logos ed.)
Offensive weapons can be divided into hand-held or short-range, medium-range, and long-range weapons. Among short-range weapons, the club was usually larger at the striking end (Prov. 25:18). The mace was a variation of the club with a stone or metal head (possibly implied in Ps. 68:21 [MT 22]; Hab. 3:13). The battle-ax came from axes used for cutting wood (possibly Jer. 51:20). The spear had a sharp blade affixed to the end of a long stick. It was a stabbing or thrusting weapon (John 19:34). The sword was very common (more than 400 occurrences in the OT), used for stabbing in hand-to-hand combat. It was short or longer, straight, and generally kept in a sheath (1 Sam. 17:51). The sickle sword was curved like a sickle and sharp on only one side. It was used for slashing rather than stabbing, and is implied in “smiting someone with the edge of a sword” (Josh. 8:24; Judg. 21:10).