Yitzchak then brought her into the tent of his mother Sarah, and he took Rivkah as his wife. Yitzchak loved her, and thus found comfort after his mother’s death.
English: He brought her into the tent and she became the very image of his mother Sarah—that is to say, she was [as] Sarah his mother: all the while Sarah was alive a lamp burned from erev Shabbat to erev Shabbat, blessing was present in the dough, and a cloud was bound over the tent; when she died these ceased, and when Rivkah came they returned.
On the daf / in context: Bringing Rivkah into Sarah’s tent is read as the restoration of the three signs that had marked Sarah’s presence: the lamp, the dough, and the cloud.
Type of Learning
Derash on the verse (Rashi / midrash) — not a formal named middah of the 13: the phrase “the tent of Sarah his mother” is taken as the transfer of Sarah’s household blessings to Rivkah.
What Is Learned
Yitzchak brought Rivkah into Sarah’s tent and she became as Sarah had been: the Shabbat lamp, the blessing in the dough, and the cloud over the tent returned with her.