Related על קידושין 3:3

"[Be betrothed to me] with the understanding that I will show you 200 zuz", if he showed [200 zuz randomly lying] on the table—she is not betrothed, for [we assume the understanding of those words is that he would] only show her [money] that belonged to him. "With the understanding that I have a beit kor of earth"—she is betrothed, for perhaps he will have it at the end of the world. "With the understanding that I have [a beit kor] in a certain place", if he has it in that place—she is betrothed; but if not—she is not betrothed. "With the understanding that I will show you a beit kor of earth", if he showed [it] to her in the valley [where no one owns the land]—she is not betrothed, for he only said to show to her what was his.