A mountain mentioned in Isaiah 28:21. It seems it was near Baal-perazim, which means “Baal of Breaches.” Baal-perazim is where King David defeated the Philistines. From the context of 2 Samuel 5:20, it appears that this battleground was in the valley of Rephaim, which is southwest of Jerusalem.
Mount Perazim
From Tyndale Bible Dictionary, adapted by Mission Mutual. CC BY-SA 4.0.