And it came to pass at the end of two years (Genesis 41:1)
Every affliction to befall man has a set time to end; as it is written, "An
end He set to darkness, and every limit He investigates" (Job 28:3). This
is said regarding Joseph, who was ten years in prison but G-d investigated
and saw that it is necessary for him to be imprisoned for another two years...
"In every sorrow there is profit" (Proverbs 14:23). This, too, is said
in regard to Joseph, who suffered in prison and then profited from it [in
becoming] ruler over Egypt.
As he interpreted to us, so it was (41:13)
Said Rabbi Banaah: There were 24 interpreters of dreams in
Jerusalem. Once I had a dream and went around to all of them and they
all gave different interpretations, and all were fulfilled, confirming
that which is said, "All dreams follow the mouth."
(Talmud, Berachot 55b)