From Pathfinder Lost Omens The Grand Bazaar, which isn't enabled.

Crushing

ITEM 3

Price 50 gp

Usage etched onto bludgeoning weapon

Bulk —

Weapons with this rune empower your strength, and attacks with these weapons leave your foe staggered. When you critically hit a target with this weapon, your target becomes Clumsy 1 and Enfeebled 1 until the end of your next turn.

Effect: Crushing

Pathfinder Lost Omens The Grand BazaarOGL