I understand that it is recommended to say the Dhikr of Sujood and Ruku more than once. But is it superior to say Subhanallah 3 times and then recite the Dhikr of Ruku, or just to recite the Dhikr of Ruku 3 times?
It is recommended to say Subhanallah one time or more before Dhikr of Rokoo' and Dhikr of Sojood. If you say Subhanallah three times, it will be like saying Dhikr of Rokoo' or Sojood one time. Repeating Dhikr is recommended either three times or five or seven or nine or more odds.
Wassalam.