https://abukhadeejah.com/wear-a-ring-on-the-forefinger-middle-finger-and-to-abbreviate-salallahu-alaihi-wasallam-to-saw/
Is it allowed to wear a ring on the forefinger and middle finger? And is it allowed to abbreviate "salallāhu ʿalaihi wasallam" to "S" or "SAW"? Shaikh Al-Islam Ibn Bāz.