Its signification is too familiar to cause mistakes, and it can therefore be used Proleptically, just as the name of the Philistines themselves is used Proleptically in the twenty-first chapter of Genesis.
"Patriarchal Palestine"
Archibald Henry Sayce
In saying, consequently, that the kingdom of Abimelech was in the land of the Philistines the Book of Genesis speaks Proleptically: when the story of Abraham and Abimelech was written in its present form Gerar was a Philistine town: in the days of the patriarchs this was not yet the case.
"Patriarchal Palestine"
Archibald Henry Sayce