Seratul tasbi

It seems like you're referring to "Subha" or "Tasbih," which are Islamic prayer beads used to keep track of counting repetitive prayers or phrases, such as "Subhanallah" (Glory be to Allah), "Alhamdulillah" (Praise be to Allah), and "Allahu Akbar" (Allah is the Greatest). These beads help Muslims maintain focus during their devotional practices.