question #1 Sahih Muslim Introduction 80, Introduction, Narration 79 : What criteria should be considered when selecting narrators for hadith transmission?

‘Write from Baqiyyah what he transmits on authority of those who are well-known, and do not write from him what he transmits on authority of those who are not; do not write from Ismā’īl bin Ayyāsh what he transmits on authority of those who are well-known or otherwise ’.