Rulings Regarding Prayer- Rukū'- Part 2
We said that rukū' is one of the rukns of prayer, and one of the obligatory components of rukū' is the dhikr of rukū' which must be recited during rukū'. When performing ruku', based on obligatory precaution one must recite "سبحان الله" three times or "سبحان ربی العظیم و بحمده" one time in correct Arabic, and it is recommended for one to repeat this dhikr up to three, five or seven times.
While reciting the obligatory dhikr, one must be careful to keep their body at rest, and they must not recite the dhikr while moving. Even when they recite the recommended dhikr with the intention of reciting the dhikr of rukū', their body must be still. And if they rise intentionally before the obligatory dhikr of rukū' is completed, their prayer will become invalid.
But if they rise inadvertently and notice this issue after coming out of rukū', their prayer is valid and they do not need to repeat it. But if they notice this issue before coming out of rukū', they should repeat the dhikr when the body becomes still.
If someone bumps in to the worshipper or if his or her body starts moving inadvertently, the dhikr must be repeated after the body becomes still; however, small movements when reciting the dhikr do not invalidate the prayer.
Finally, one should stand straight after they have performed rukū' and they should wait a little until their body becomes completely still. This is what is called Qiyām after rukū', which is obligatory, and if worshippers do not perform it intentionally, their prayer is invalid. But if they do not perform it inadvertently, their prayer is valid.