If The Devil Is Waiting

Riddle: When people add me they're often shaking; On the tip of their tongue theres no mistaking; I'm hear to help if the devil is waiting. What am I?

Answer: Salt

Source: https://www.riddles.com/2044

When people add me they're often shaking;
On the tip of their tongue theres no mistaking;
I'm hear to help if the devil is waiting.
What am I? — If The Devil is Waiting by Morgan Foster v1.

Riddle: When people add me they're often shaking;
On the tip of their tongue theres no mistaking;
I'm hear to help if the devil is waiting.
What am I? Answer: Salt — by Morgan Foster v2.