Rebels - S3E16 - "Legacy of Mandalore"

3:54 - Sabine (to Tristan):  "I'll explain everything; I promise."  In The Phantom Menace, Obi-Wan tells Anakin, "You will be a Jedi; I promise" [2:07:43], and in Revenge of the Sith, Padmé tells Anakin, "I'm not gonna die in childbirth, Ani; I promise you," and he replies, "No, I promise you" [53:46].

4:30 - Tristan:  "You shouldn't have come back, Sabine."  Vader also says this to Obi-Wan in A New Hope:  "You should not have come back" [1:31:00].

10:15 - Sabine (to her mother):  "Look, the Rebels are planning something, and we need your help."  The same phrase appears in The Phantom Menace (Queen Amidala tells Jar Jar, "I need your help" [1:37:55]), Revenge of the Sith (Obi-Wan says, "Padmé, I need your help" [1:38:44]); and A New Hope (Obi-Wan says, "I need your help, Luke.  She [Leia] needs your help." [36:03]).

14:55 - Ursa (after Gar Saxon says she "consorted with known traitors"):  "What are you talking about?"  This line appears three times in A New Hope:  twice, C-3PO asks R2-D2, "What are you talking about?" [6:51 and 9:47], and later, in response to Luke's urge to rescue Leia, Han asks, "What are you talkin' about?" [1:11:03].  In Attack of the Clones, Anakin also asks Padmé, "What are you talking about?" [1:43:07].