5:33 - Hera (about the Empire): "They'll be back." In A New Hope, Obi-Wan also says this, but about the Tusken Raiders: "The sand people are easily startled, but they'll soon be back and in greater numbers" [31:52].
6:00 - Mart: "We had everything under control." Han makes the same claim (to Leia) in A New Hope: "I had everything under control till you led us down here" [1:19:37].
12:30 - Mart (thinking his detached cargo destroyed the Imperial ship): "I got 'em! I got 'em!" Luke also exclaims this after successfully shooting down one of the Imperial sentry ships in A New Hope: "Got him! I got him! [1:35:25]
15:31 - Mart (after the rebels return to rescue him): "I don't believe it!" Luke also says, "I don't, I don't believe it" in The Empire Strikes Back, after Yoda uses the Force to get his X-wing out of the swamp [1:13:10].