he narrated in what was read out to him (حَدَّثَنَا قِرَاءَةً عَلَيْه)
الحديث
التعريف :
This is a formula to narrate the hadiths the narrator learnt through reading out to the teacher, if he was not the one who read out. It may be used by a single narrator to elevate his status, not to indicate a group of students.