Are you trying to identify the origin of a specific public document (like a university list or a company directory) where this line appears?

: Using names like "Mohammed" or generic email addresses like "yahoocom" (often missing the dot to avoid being flagged) is a hallmark of low-effort mass spam. Essential Safety Steps Do Not Reply

A file named accounts_3013.txt containing “mohammed” with Yahoo/Hotmail entries would fit this pattern.