מדרש על בראשית 9:9

Another interpretation (of Job 28:3): HE PUTS AN END TO THE DARKNESS. All the afflictions which come upon humankind have an end to them, as stated (ibid., cont.): AND HE SEARCHES OUT EVERY LIMIT. < The verse > speaks about Joseph when he was bound in the prison. He had been there ten years, and he was to get out in eleven. Ergo (in Job 28:3): HE PUTS AN END TO THE DARKNESS. What is the meaning of (ibid., cont.): AND HE SEARCHES OUT EVERY LIMIT? That, when his time arrived to get out, the Holy One sat down, searched out, and saw that he was required to be in the prison two more years because he had trusted in the chief of the cupbearers in that he said to him two times (in Gen. 40:14): BUT KEEP ME IN YOUR REMEMBRANCE (rt.: ZKR) … AND MENTION (rt.: ZKR) ME UNTO PHARAOH.³Tanh., Gen. 9:9; Gen. R. 89:2; Exod. R. 7:1; M. Pss. 18:28. The Holy One said to him: You trusted in him with two rememberings (rt.: ZKR). By your life, do two more years < in prison > . Thus it is stated (in Gen. 41:1): NOW IT CAME TO PASS AT THE END OF TWO FULL YEARS.