Who did first sadat to hazrat Adam?

The term "Sadat" refers to the descendants of Hazrat Muhammad (peace be upon him), specifically the lineage through his daughter Fatimah and her husband Ali. Hazrat Adam, being the first human and prophet in Islamic belief, is considered the ancestor of all humans, including the Sadat. Therefore, the first Sadat can be understood as being part of a long lineage that traces back to Adam, but the specific title "Sadat" applies to the descendants of Muhammad, not Adam directly.