English: “Sarah’s lifetime was one hundred years and twenty years and seven years.” At one hundred she was like twenty regarding sin, and at twenty she was like seven regarding beauty.
On the daf / in context: The broken numbering of the years is read midrashically as equal righteousness and beauty across the stages of her life; all her years were equally good.
Type of Learning
Derash on the verse (Midrash / Rashi tradition) — not a formal named middah of the 13. The segmented age formula is interpreted as qualitative comparison across life stages.
What Is Learned
Sarah’s years are praised as uniformly complete: freedom from sin in maturity and unspoiled beauty in youth, so that every stage of her life stands as “temimim.”