The chain of Narrators to Prophet Mohammad(صلى الله عليه وسلم ) in Hadith is called_____

The chain of Narrators to Prophet Mohammad(صلى الله عليه وسلم ) in Hadith is called_____

حدیث میں رسول اللہ صلی اللہ علیہ وسلم کے راویوں کا سلسلہ _____ کہلاتا ہے۔
Explanation

A hadith has two independent portions.

The first is called its chain  of the narrators via whom the text has reached the muhaddith who has collected it and recorded in his book called a collection of Ahadith.

The second portion is called the text