A small detail of two estranged brothers reunited stands out because it is the Torah's first mention of Ishmael since he and his mother were exiled from the home of Abraham and Sarah (Genesis, chapter 21). Many years have passed. Unexpectedly the two brothers are seen standing together. The previous verse testifies that, "Abraham expired, and died in a good old age, and old man, and full of years; and was gathered to his people" (Genesis, 25:18). His state of contentment, mentioned at the end of his life alone among all the other patriarchs and matriarchs, could stem from seeing his two sons together after a long period of estrangement. Rashi understands that Isaac and Ishmael must have reconciled before Abraham's passing. There is nothing that could have provided for Abraham's final contentment more than the reunification of his two sons.
(1) Sarai, Abram’s wife, had borne him no children. She had an Egyptian maidservant whose name was Hagar. (2) And Sarai said to Abram, “Look, ה' has kept me from bearing. Consort with my maid; perhaps I shall have a child through her.” And Abram heeded Sarai’s request. (3) So Sarai, Abram’s wife, took her maid, Hagar the Egyptian—after Abram had dwelt in the land of Canaan ten years—and gave her to her husband Abram as concubine. (4) He cohabited with Hagar and she conceived; and when she saw that she had conceived, her mistress was lowered in her esteem. (5) And Sarai said to Abram, “The wrong done me is your fault! I myself put my maid in your bosom; now that she sees that she is pregnant, I am lowered in her esteem. ה' decide between you and me!” (6) Abram said to Sarai, “Your maid is in your hands. Deal with her as you think right.” Then Sarai treated her harshly, and she ran away from her. (7) A messenger of ה' found her by a spring of water in the wilderness, the spring on the road to Shur, (8) and said, “Hagar, slave of Sarai, where have you come from, and where are you going?” And she said, “I am running away from my mistress Sarai.” (9) And the messenger of ה' said to her, “Go back to your mistress, and submit to her harsh treatment.” (10) And the messenger of ה' said to her,
“I will greatly increase your offspring,
And they shall be too many to count.” (11) The messenger of ה' said to her further,
“Behold, you are pregnant
And shall bear a son;
You shall call him Ishmael,
For ה' has paid heed to your suffering.
(12) He shall be a wild ass of a person;
His hand against everyone,
And everyone’s hand against him;
He shall dwell alongside of all his kin.” (13) And she called ה' who spoke to her, “You Are El-roi,” by which she meant, “Have I not gone on seeing after my being seen!” (14) Therefore the well was called Beer-lahai-roi; it is between Kadesh and Bered.— (15) Hagar bore a son to Abram, and Abram gave the son that Hagar bore him the name Ishmael. (16) Abram was eighty-six years old when Hagar bore Ishmael to Abram.
The Book of Legends, Bialik and Ravnitsky
"And Abraham rose up early in the morning . . . and sent her away" (Gen. 21:14). Abraham took a wheeled water tub and tied it to Hagar's loins so that it would be pulled behind her, in order that whenever Abraham wished to see his son Ishmael, he might readily make out the direction in which Hagar and Ishmael had gone.
Presently Ishmael settled in the wilderness of Paran and took for himself a wife from the plains of Moab--her name was Aissa.
At the end of three years, Abraham went to see his son Ishmael in the wilderness of Paran, after first swearing to Sarah that he would not dismount from his camel at the place where Ishmael was living. Abraham reached there at midday, found Ishmael's wife, and asked her, "Where is Ishmael?" She replied, "He and his mother went to bring some fruits and brooms from the wilderness." Abraham said, "Give me a little water and a little bread, for I am weary from the journey through the wilderness." She replied, "No bread, no water." Abraham said, "When your husband Ishmael returns, tell him, "An old man from the land of Canaan came to see you and said to tell you, 'The household of this house is not in good repair.' " When Ishmael returned, his wife gave him the message--whereupon he divorced her. Then his mother sent for a woman from her father's house in the land of Egypt. Her name was Fatima, and Ishmael took her as his wife.
At the end of another three years, Abraham went again to see his son Ishmael, after once more swearing to Sarah that he would not dismount from the camel at the place where Ishmael lived. He reached there at midday, found Ishmael's wife, and asked her, "Where is Ishmael?" She replied, "He and his mother have gone to graze the camels in the wilderness." He said, "Give me a little bread and a little water, for I am weary from the journey through the wilderness." She brought these out and gave them to him. Then Abraham entreated the Holy One in his son's behalf, and Ishmael's house was filled with all manner of good things. When Ishmael came back, his wife told him what had happened.
Then Ishmael realized that his father still loved him.
קטורה. זוֹ הָגָר, וְנִקְרֵאת קְטוּרָה עַל שֶׁנָּאִים מַעֲשֶׁיהָ כִּקְטֹרֶת (בראשית רבה),
קטורה KETURAH — This is Hagar. She was named Keturah because her deeds were as beautiful (sweet) as incense (Ketoreth) (Genesis Rabbah 61).
(12) This is the line of Ishmael, Abraham’s son, whom Hagar the Egyptian, Sarah’s slave, bore to Abraham. (13) These are the names of the sons of Ishmael, by their names, in the order of their birth: Nebaioth, the first-born of Ishmael, Kedar, Adbeel, Mibsam, (14) Mishma, Dumah, Massa, (15) Hadad, Tema, Jetur, Naphish, and Kedmah.
While Torah is mostly devoted to recounting the destiny of Abraham and Sarah and the Jewish people, the text detours to number the progeny of Ishmael. The fact that there are twelve sons, exactly parallel to the children of Jacob a generation later, hints at an affirmation of the line of Ishmael as well. The special destiny promised to Abraham through Isaac and their descendants does not preclude a special if separate destiny for Ishmael and his children in the divine plan. The unfolding of the lives of Ishmael's children is not revealed in detail, for that is not the focus of Torah. We have simply a hint at their special place in God's plan. God promised an enduring future for Ishmael to his mother, Hagar (Genesis 21:18). Multiple parallel destines ordained by God are implied. Respect for the special place that others hold in god's design is also strongly implied.