question #3 Sahih Muslim 348b, Book 3, Hadith 106 : What is the significance of the chain of transmitters in the authenticity of a hadith?

This hadith is narrated by Qatida with the same chain of transmitters, but with minor alterations. Here instead of the word – (jahada, (ijtahada) has been used, and the words;” Even if there is no orgasm” have been omitted.