Komentaryong Sumisipi para sa Mga Awit 128:6

ואברהם זקן בא בימים, “Avraham had become old, advanced in years.” The Torah writes this comment at this point in order to inform us that as a result of the death of Sarah, symptoms of old age suddenly became manifest in Avraham’s whole demeanour. This is also what the sages had in mind when they said” “a wife’s death primarily affects her husband.” True, the Torah had already described both Avraham and Sarah as זקנים באים בימים, “old, advanced in years” (18,11), the matter has been repeated because as a result of Sarah having become pregnant and given birth to Yitzchok both she and her husband had become rejuvenated. Avraham now reverted to being an old man. It is also possible to justify the mention of Avraham having become an old man at this point in view of what follows, i.e. his empowering Eliezer to choose a wife for his son Yitzchok, seeing G’d’s promise that he would die at an old age בשלום, i.e. having seen his major hopes fulfilled, this could not occur until Yitzchok had been married and had produced an heir. We know from Psalms 128,6 וראה בנים לבניך שלום על ישראל, “and live to see children of your children, peace be unto Israel,” that until one has been blessed with grandchildren one does not consider oneself as having died בשלום. He therefore had concluded that the time was overdue to see to it that Yitzchok would marry. The Torah testifies that Avraham considered himself as blessed in all areas of life, i.e. וה' ברך את אברהם בכול, although he was too old now to undertake a strenuous journey to Aram Naharayim. The word בא in our verse is to be understood as being in the past tense as in Genesis 27,35 בא אחיך במרמה, “your brother has already come, deviously, etc.”