TT #14 · Parashas Chayei Sarah · Passuk 24:1
Avraham was now old, advanced in years, and Hashem had blessed Avraham in all things.
Torah Temimah points to Kiddushin 82a. E-Daf · Sefaria — Kiddushin 82a
TT lemma: וה׳ ברך.
The Torah protects a person from all evil in his youth and gives him a good end and hope in his old age, as it is said “And Avraham was old and Hashem blessed Avraham in all.”
Custom (Bavli — Torah’s protection through the lifespan)
A life of Torah study guards a person in youth and yields blessing and hope in old age, as exemplified by Avraham who was both “old” and “blessed in all.”