The "not talking" part is basically just there to help you stick to the code of discipline [1] which is:
1. to abstain from killing any being;
2. to abstain from stealing;
3. to abstain from all sexual activity;
4. to abstain from telling lies;
5. to abstain from all intoxicants.
With "not talking" you automatically follow number 4 :)
1. to abstain from killing any being; 2. to abstain from stealing; 3. to abstain from all sexual activity; 4. to abstain from telling lies; 5. to abstain from all intoxicants.
With "not talking" you automatically follow number 4 :)
[1] https://www.dhamma.org/en/about/code