תהילים קז:כז פירוש: רש״י

They were frightened Heb. יחוגו. This is an expression of breaking. Similarly (Song 2:14): “in the clefts of (בחגוי) the rock”; and similarly (Isa. l9:17), “And the land of Judah will be to Egypt for a dread (לחגא).”