The source gives two standard examples:
«كنقل القرآن والصلوات الخمس»
Such as the transmission of the Qur’an and the five daily prayers.
The Qur’an has been preserved through communal transmission across generations, while the foundational prescription and number of the five prayers are likewise known through the continuous public practice and teaching of Muslims.
The example should not be extended uncritically to every detailed subsidiary ruling of prayer. The fundamental prescription and a disputed particular practice can have different evidentiary bases.