After the death of Saul, David returned from defeating the Amalekites and stayed at Ziklag two days.

He asked me, ‘Who are you?’ I told him: I’m an Amalekite.

David inquired of the young man who had brought him the report, “Where are you from?”

“I’m the son of a foreigner,” he said. “I’m an Amalekite.”

For David had said to the Amalekite, “Your blood is on your own head because your own mouth testified against you by saying, ‘I killed the Lord’s anointed.’”

from Edom, Moab, the Ammonites, the Philistines, the Amalekites, and the spoil of Hadadezer son of Rehob, king of Zobah.