Crawler mucus

This poison must be harvested from a dead or incapacitated crawler. A creature subjected to this poison must succeed on a DC 13 Constitution saving throw or be poisoned for 1 minute. The poisoned creature is paralyzed. The creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.\n\n **_Contact._** Contact poison can be smeared on an object and remains potent until it is touched or washed off. A creature that touches contact poison with exposed skin suffers its effects.

Source: System Reference Document 5.1 · CC-BY-4.0 · 5th Edition 2014