time periods in the chain of transmission (طَبَقَات السَّنَد)
الحديث
التعريف :
The time periods to which narrators mentioned in the chain of transmission belonged. The main periods in every chain of transmission are: the category of the prophet’s companions, the tābiꜤīn category, the successors of the tābiꜤin category, the successors of the successors of the tābiꜤin category, etc.