Berakhot 55B

וההיא שעתא אמיה לא הות.

and 11 stars bowed down to me” (Genesis 37:9), and at that time his mother was no longer alive. According to the interpretation of the dream, the moon symbolizes Joseph’s mother. Even this dream that was ultimately fulfilled contained an element that was not fulfilled.

אמר רבי לוי: לעולם יצפה אדם לחלום טוב עד עשרים ושתים שנה. מנלן? מיוסף, דכתיב: ״אלה תלדות יעקב יוסף בן שבע עשרה שנה וגו׳״, וכתיב: ״ויוסף בן שלשים שנה בעמדו לפני פרעה וגו׳״. מן שבסרי עד תלתין כמה הוי? תלת סרי, ושב דשבעא ותרתי דכפנא ⁠— הא עשרים ושתים.

From the same source, R' Levi said: One should always anticipate fulfillment of a good dream up to 22 years after the dream. From where do we derive this? From Joseph, as it is written in the story of Joseph’s dream: “These are the generations of Jacob. Joseph, being 17 years old, was feeding the flock with his brothers” (Genesis 37:2); and it is written: “And Joseph was 30 years old when he stood before Pharaoh King of Egypt” (Genesis 41:46). From 17 to 30 how many years are they? 13; and add 7 years of plenty and two of famine; the total is 22 and only then was the dream fulfilled when his brothers came and bowed down to him.

אמר רב הונא: לאדם טוב אין מראין לו חלום טוב, ולאדם רע אין מראין לו חלום רע.

Rav Huna said: A good person is not shown a good dream and a wicked person is not shown a bad dream; rather, a good person is punished for his relatively few transgressions with bad dreams and a wicked person is rewarded for his relatively few merits with good dreams.

תניא נמי הכי: כל שנותיו של דוד לא ראה חלום טוב, וכל שנותיו של אחיתופל לא ראה חלום רע.

That was also taught in a baraita: All of King David’s life he never saw a good dream, and all of Ahitophel’s life he never saw a bad dream.

והכתיב: ״לא תאנה אליך רעה״. ואמר רב חסדא אמר רב ירמיה בר אבא: שלא יבהילוך לא חלומות רעים ולא הרהורים רעים. ״ונגע לא יקרב באהלך״⁠ — שלא תמצא אשתך ספק נדה בשעה שאתה בא מן הדרך. אלא איהו לא חזי ליה, אחריני חזו ליה.

The Talmud raises a difficulty: Is it not written: “No evil should befall you, neither should any plague come near your tent” (Psalms 91:10)? And Rav Ḥisda said that Rav Yirmeya bar Abba said in explanation of that verse: This means that you will be frightened neither by bad dreams nor by evil thoughts. Neither should any plague come near your tent, means that you will never find your wife with the uncertain status of a menstruating woman when you return from a journey. This proves that it is impossible that a righteous person will experience bad dreams throughout his life. Rather, one might say that he does not see bad dreams; others see bad dreams about him.