Abimelech probably sent someone to tell Isaac that Abimelech wanted to see him. AT: "Abimelech sent someone to bring Isaac to him" (See: [[rc://en/ta/man/translate/figs-metonymy]])
This is a quotation within a quotation. It can be stated as an indirect quotation. AT: "Why did you say that she is your sister?" (See: [[rc://en/ta/man/translate/figs-quotesinquotes]] and [[rc://en/ta/man/translate/figs-quotations]])