שמעו נא החלום, please listen to the dream, etc. He had to add the word נא, please, because at first they had refused to listen.

Alternatively, in accordance with Berachot 56, dreams should preferably be interpreted on the day following (the same day) the night they have been dreamt. This is the reason that one may fast even on the Sabbath if one has had a bad dream. Joseph therefore insisted that the brothers hear him out at once. Any delay might result in the dream not being fulfilled. He may also have wanted to prove to them that he had not told any of his friends about this dream expecting them to give him a positive interpretation, but had instead come to his brothers first. Had he first told his friends of his dream the brothers would not have believed that he wanted to convince them that he wanted to be on good terms with them. According to Berachot 55 Rabbi Banah once told his dream to 24 different interpreters and received 24 different interpretations, each one of which proved correct. It is possible that this was so because none contradicted any of the other interpretations. When contradictory interpretations are received the more recent interpretation cannot cancel out a previous one. Joseph may have wanted to convince the brothers of his תמימות, his sincerity, by offering them a chance to come up with a negative interpretation of his dream which his friends could not later on nullify. He did this by urging them to listen to his dream immediately.

החלום הזה, "this dream.⁠" The use of the definitive article ה in front of the word חלום indicates that he had already told them that he had had a dream without revealing any details about it. Now he repeated: "please listen to the dream which I have dreamed.⁠"