From Pathfinder Beginner Box: Secrets of the Unlit Star, which isn't enabled.

Poisonous Dagger

ITEM 5

AGILE FINESSE MAGICAL POISON THROWN-10 VERSATILE-S

Price 150 gp

Usage held in 1 hand

Bulk L

Category simple

Group knife

Damage 1d4 piercing

This +1 striking dagger has an image of a snake emblazoned on its blade. When you critically succeed at an attack roll with the dagger, magical fangs emerge and poison the target, dealing 1d4 persistent poison damage.

Pathfinder Beginner Box: Secrets of the Unlit StarORC