«وَارْكَعُوا مَعَ الرَّاكِعِينَ»
Bow with those who bow.
The verse establishes bowing. A distinct question asks the rank of bodily composure (taʿdil) during bowing and other prayer movements.
In this Hanafi application, the basic bowing is obligatory by the Quranic command, while the composure established by reports can be legally wajib. Assigning different evidentiary ranks does not endorse careless prayer: omitting a wajib remains a serious legal matter.