I have seen the numbers 12 and 13 and a star. What does it mean?
Bismillahi ‘r-Rahmani ‘r-Raheem,
Allahumma salli `ala Muhammad,
wa `alaykum salam,
Musa (a.s.) and Aaron (a.s.) are the 12th and 13th Prophets that are mentioned in the Quran when counting from the Messenger (s). Mawlana Shaykh is showing you that you are Musawi and Haruni – inheriting from the secret of Prophet Moses (a.s.) and Aaron (a.s.). The star represents the Messenger (s) in which all Prophets inherit their prophethood from.
and Allah knows best