Musannaf Ibn Abi Shaybah 7871 — Counting tasbih on the fingers

A man from Tufawah said: I stayed as a guest with Sayyiduna Abu Hurayrah (may Allah be pleased with him), and he had a small bag containing pebbles or date stones. He would say over them 'Subhan Allah, Subhan Allah'. When the bag became empty, he would give it to a black slave-girl, and she would gather them again and put them back in it.