Midrasch zu Bereschit 37:20

His master’s wife cast her eyes upon Joseph (Gen. 38:7). Scripture states elsewhere in allusion to this verse: Death and life are in the power of the tongue; and they that indulge it shall eat the fruit thereof (Prov. 18:21). R. Hiyya the son of Abba declared: If a man should eat from a basket of figs without offering a blessing, death is in the power of the tongue, but if he should pronounce the blessing and then eat it, life is in the power of the tongue. All of the trials that befell Joseph occurred because of the evil he spoke against his brothers, as it is said: And Joseph brought evil report of them unto his father (Gen. 37:20).

(Gen. 37:19-20:) HERE COMES THIS DREAMER. SO COME NOW, AND LET US KILL HIM…. < AND WE SHALL SEE WHAT WILL BECOME OF HIS DREAMS >. R. Isaac said: This Scripture cries out for exposition. Who said (in vs. 20): AND WE SHALL SEE < WHAT WILL BECOME OF HIS DREAMS >? Actually they had said (at the beginning of the verse): COME, AND LET US KILL HIM.³³Rashi, on Gen. 37:20, explains that the brothers could not have said, AND WE SHALL SEE WHAT WILL BECOME OF HIS DREAMS. Since they were about to slay him, his dreams would have been meaningless. So the Holy Spirit says: Let us observe them. They said (ibid.): COME, AND LET US KILL HIM; and he said (in vs. 7): NOW LOOK, YOUR SHEAVES GATHERED AROUND. Now let us see whose < sheaf > stands up, yours or mine.

"A man found him, and behold! He was blundering in the field: Rabbi Yannai said: He [Joseph] was met by three angels for scripture says, "A man found him" (Gen. 34:15); "and the man asked him"; and "the man said" (Gen. 34:17). "They have gone from here" - from the characteristics of the Place. "And they saw him far off"(Gen. 34:18): They said, 'Let us kill him by inciting the dogs against him.' "And they said one to another behold the dreamer comes"(Gen. 34:19): the rabbis said, “they exclaimed, Behold he is coming wrapped in his dreams”. Rabbi Levi said, “[they said] this one will ensnare us into serving foreign overloads.” "Come now therefore and let us slay him"(Gen. 34:20): The Holy One of Blessing said to them, “You say ‘We shall see’ and I say ‘We shall see’. Indeed "we shall see whose words will be fulfilled." (Jer. 34:28)