English: “After I have withered…” Rav Chisda said: “After I have withered, shall I have pleasure”—after the flesh had withered and the wrinkles had multiplied, the flesh was rejuvenated, the wrinkles smoothed out, and beauty returned to its place.
On the daf / in context: The phrase is read as a statement of wonder at the physical restoration that accompanied the promise of a child in old age.
Type of Learning
Derash on the verse (Bavli sugya) — not a formal named middah of the 13. The words are taken to describe an actual physical rejuvenation.
What Is Learned
Sarah’s body was restored to youthful beauty after the announcement: the withered flesh was renewed and the wrinkles disappeared.