Genesis 43:14

and God the Almighty give you mercies before the man, that he may release to you your other brother, and Benjamin: and I, behold, I am now certified by the Holy Spirit that if I am bereaved of Joseph, I shall also be bereaved of Shimeon and of Benjamin.

THAT HE MAY SEND AWAY YOUR OTHER BROTHER, AND BENJAMIN. In line with the literal interpretation of Scripture, it would seem that Simeon was not a favorite of his father because of the Shechem affair. This was why he did not say, “My son Simeon, and Benjamin,” as he would not mention him by name, and as he left him in Egypt for a long time. Indeed, had there been food in his house, he would not yet have sent Benjamin, and he would have left him [Simeon] in Egypt.
Now Rashi wrote, “The other one: the spirit of prophecy was enkindled within Jacob so as to include Joseph.” In Bereshith Rabbah they also said: “That he may send away your brother: this refers to Joseph. The other one: this refers to Simeon.” This is correct, for at the moment of prayer, Jacob directed his heart to pray in a general manner for the other one [Joseph] also, for perhaps he is still alive.
There in Bereshith Rabbah, the Rabbis expounded on the verse in yet another way, saying, “Rabbi Yehoshua ben Levi interpreted the verse as alluding to the exiles: And G-d Almighty give you compassion before the man — this is a reference to the Holy One, blessed be He, as it is said, The Eternal is a man of war, and it is written, And He gave them compassion before their captors. That he may send away your brother — this alludes to the Ten Tribes exiled by the Assyrians. The other one, and Benjamin — this refers to the exile of Judah and Benjamin. And as for me, bereaved by the First Destruction [brought about by the Babylonians], I am bereaved by the Second Destruction [caused by the Romans], but no more will I be bereaved.” This is the language of the Rabbis, may their memory be blessed.
The intent of this text is to suggest that Jacob’s going down to Egypt alludes to our present exile at the hand of Edom, as I will explain,. and the prophet [Jacob] saw this matter at its very inception, and so he prayed about it in a general way, which was applicable to the moment as well as to the future. This verse, according to their interpretation, contains a great mystic thought. Jacob was saying: “And G-d Almighty, by the Divine attribute of justice, give you the compassion that is before Him,” meaning that “He should direct you upward from the Divine attribute of justice to that of compassion.” The student versed in the mystic teachings of the Torah will understand.

כאשר שכולתי שכלתי, an expression parallel to Esther’s saying when she risked her life appearing uninvited before the king, saying: כאשר אבדתי אבדתי, “if I have forfeited my life, so be it.” (Esther 4,16)

ושלח, he will release Shimon to you from his imprisonment.

כאשר שכלתי שכלתי, seeing the subject matter is being repeated, Yaakov changed the wording he used, something that is standard procedure in Scriptures, as we pointed out previously. (21,1) The first word shakolti is from a passive mode, whereas the second word shakalti is an active mode. What he meant was: “what can I do if some mishap will befall one of you, just as I have already had to endure the bereavement of Joseph having been lost. I may have to make peace with the idea of losing anyone of you due to whatever mishap will befall him. [The first word refers to the past, when it had never occurred to Yaakov that something might happen to Joseph; hence it is described as something in which Yaakov views himself as having been totally passive. If something were to happen now, he could not view himself as a totally passive bystander, seeing he had agonised about the very fact that it might happen. Therefore, according to the author, the active mode is justified here. Ed.]

ואל שדי יתן לכם רחמים לפני האיש, “and may G–d Almighty give you mercy before the man what prompted Yaakov to single out the attribute of G–d known as shadday when blessing his sons before they commenced this journey? It teaches you that Yaakov had already endured many trials in his life. These had commenced already when he was still in his mother’s womb and Esau fought with him to become the firstborn. (Compare Genesis 25,22, when his mother was distraught and asked G–d what was going on inside her womb.) The sages concluded that the two as yet unborn children had already struggled for possession of two worlds. Esau tried to kill Yaakov already as soon as he was born as is evident from Amos 1,11, על רדפו בחרב אחיו, “when he pursued his brother with the sword (simile for trying to kill him). He had to flee to Lavan to save his life, and had endured many problems while with his “uncle” for 20 years. As soon as he left there Lavan pursued him. He lists them during the encounter with Lavan. (Genesis 31,40) Esau then came towards him in order to attack him, As a result he lost a great deal of the wealth he had acquired by buying him off with a gift. Next his best loved wife died on the way and he could not even bury her in the ancestral gravesite. Next his daughter Dinah was raped, and then his beloved son Joseph was lost. When he felt that finally he could settle down to a normal life in one place, (Genesis 37,1) the problems with Joseph began. During the brothers’ first trip to Egypt Shimon, his second oldest son was incarcerated and he now had to Shimon being incarcerated and his sons forced him to allow Binyamin to travel to Egypt in order to secure the release of Shimon. He could have said, as did Job in Job 3,26: “I had no repose, no quiet no rest; trouble came.” (Based on Tanchuma on our portion, section 10.) In light of all this, Yaakov now called on that attribute of G–d to signal that he felt he had undergone sufficient tribulations, i.e. די, to warrant a favourite response to his blessing/prayer.