From Dr Shabbir’s research on corrupt ahadith:
The rosary beads were introduced into Islam by the Shiite Imam Ja'far Sadiq (Ja'far the truthful) through Judaism.
The story goes like this:
Hazrat Fatima 610-632, the exalted Prophet's daughter, wife of Hazrat Ali died young of spontaneous abortion soon after the Prophet (S).
Reportedly, the 6th Imam Ja'far Sadiq learned through 'direct revelation from Allah' (as all Shi'a 'Imams' claim they do) that:
Hazrat Fatima asked her illustrious father (S) for a slave. She was getting exhausted of doing the household chores. The Prophet (S) replied, "I am too busy distributing slaves among people who are more needy (although slavery had been abolished on day one in Islam). I tell you a TASBEEH (repetitious recitation) now. If you recite it after every Namaz and upon rising in the morning and before retiring, you will never get tired and never suffer from body aches.
Recite SUBHAN-ALLAH 33 times, AL-HAMDULILLAH 33 times and ALLAHU AKBAR 34 times
on each occasion.
'Imam' Ja'far Sadiq says that the exalted Prophet grabbed a Rosary bead from a Jewish friend and gave it to his beloved daughter. She never felt tired again. The Imam also named this recitation as TASBEEH-e-FATIMA.
The glorious Quran teaches us:
53:39 Every human being shall be responsible for his works, and compensated for, his labor.
No amount of praying, utterances or wishful thinking can make us good human beings or good Muslims. It is the actions that count. Counting names and words on rosary beads won’t help. This is nothing compared to what people in mostly subcontinent do in the name of religion. “Khatam” literally meaning Finish or Completion is just one example, where group of people usually hired maolvis and their battalion of students try to finish reading whole Quran as many times in one sitting in order to send sawab/ajar to some deceased person in exchange of lunch, dinner or some gifts.
These and so many other practices that make no sense at all have nothing to do with Deen Islam that Allah gifted us through our exalted Prophet Mohammed (S) in the Quran.