Judah recognized them, and said, “She is more in the right than I, inasmuch as I did not give her to my son Shelah.” And he was not intimate with her again.
English: “And he did not continue further to know her” — Shmuel the Elder said in the name of Rav Shmuel bar Ammi: once he had known her, he did not again cease from her [i.e., he married her].
On the daf / in context: One reading of “lo yasaf” is “he did not cease,” meaning ongoing marriage rather than permanent separation.
Type of Learning
R’ Yishmael #2 — Gezerah shavah on לא יסף with the language of the great Voice at Sinai that “did not cease.”
What Is Learned
After acknowledging Tamar, Yehudah took her as a wife and did not abandon her.