pf2e.fyi
From Pathfinder Adventure: The Enmity Cycle, which isn't enabled.

Usij Cultist

CREATURE 3
UNCOMMONMEDIUMEVILHUMANHUMANOID
Perception +9
Languages Common, Osiriani
Skills Athletics +10, Deception +9, Intimidation +9, Religion +5, Stealth +9
Str +4, Dex +2, Con +3, Int +2, Wis +3, Cha +3
Items Scimitar, Whip, Leather Armor, Religious Symbol of Ahriman
AC 18; Fort +12, Ref +7, Will +8
HP 50
Speed 25 feet
Melee Scimitar +11, Damage 1d6+6 slashing
Melee Whip +11 (disarm, finesse, nonlethal, reach 10, trip), Damage 1d4+6 slashing
Tripping Whip
Requirements The Usij cultist must have a whip in their hands
Trigger A creature moves out of a threatened square
Effect The Usij cultist makes a Trip attempt against the triggering creature with their whip.
Pathfinder Adventure: The Enmity CycleOGL