As we know that offering nafl after witr was the practice of the Holy Prophet Muhammad, may peace and blessings of Allah be upon him. So how to do ruku while offering nafl while sitting at no health problem so to say if one is not ma’azur.
بسم الله الرحمن الرحيم
(Fatwa: 726/722/B=08/1436)
يطاطأ راسه مع انحناء الظهر يسيرا .
One should bow one’s head in ruku and bend the back slightly. Some people go to an extent that they become closer to the position of sajdah which is not correct.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband