[3.] After this he pursues the same thought. No one (he says) could allege, that he had another son, and expected the promise to be fulfilled from him, and therefore confidently offered up this one. “And” (his words are) “he offered up his only-begotten, who had received the promises.” Why sayest thou “only-begotten”? What then? Of whom was Ishmael sprung? I mean “only-begotten” (he would say) so far as relates to the word of the promise. Therefore after saying, “Only-begotten,” showing that he says it for this reason, he added, “of whom it was said, In Isaac shall thy seed be called,” that is, “from” him. Seest thou how he admires what was done by the Patriarch? “In Isaac shall thy seed be called,” and that son he brought to be sacrificed.