Tulsi letter should not be broken for no reason
The new moon should not break basil on the date of Chadas. It is considered a curse to break Tulsi on Sundays, Fridays and even Saptami dates. While breaking the letter from Tulsi, Goddess Tulsi should allow permission to break the letter. Unfortunately, the Tulsi letter should not be broken. It is best to use the Tulsi letter falling down and worshiping in the medicines.
In relation to breaking basil letter, it is said in the air purana
Asnata Tulsi Chitvaa: Pooja Kurute Male:.
Sapradi Bhaveet Satyenam Thi OmniShamphal Bhavat ..
That is, the person who performs worship by breaking the basil after bathing without bathing. He is considered a criminal, and his worship worn his failure.
Mantra while breaking basil leaves
Matthulas Govinda Hardyananda Karini
Narayanasu Pujaadtham Chinomi Twan Namottai ..