Commentary for Genesis 22:20

אחרי הדברים האלה AFTER THESE THINGS [IT WAS TOLD ABRAHAM] etc. — When he returned from Mount Moriah Abraham was pondering and he said, “If my son had really been slain, he would have died without children! I must marry him to one of the daughters of Aner or Eshcol or Mamre”. The Holy One, blessed be He, therefore had the announcement made to him that Rebecca, the one fit to be his (Isaac’s) consort, had been born. This is what is meant by “after these things or words” — namely, “after the words” that expressed the thoughts aroused by the Binding of Isaac (Genesis Rabbah 57:3).

BEHOLD, MILCAH, SHE ALSO HATH BORN CHILDREN. Since Milcah was the daughter of his brother Haran,³⁹⁰Above, 11:29. this was a tiding to Abraham that his older brother Nahor³⁹¹Ibid., Verse 28. had been visited with many children from the daughter of his dead brother Haran.³⁹²Abraham was older than Nahor for Scripture says, Abram, Nahor, and Haran, (ibid., Verse 27). Since Nahor was older than Haran, Ramban refers to him as “the older” brother.
Now from the text of Scripture it would appear that Abraham had no knowledge of any of them except on that day. If they were visited with children in their younger days, it would be impossible for them not to have been heard until this time for the distance between Mesopotamia and the land of Canaan is not great. Now when Abraham left Haran he was seventy-five years old,³⁹³Ibid., 12:4. and Nahor was also elderly and his wife too was not young.³⁹⁴And if Nahor and his wife had had children many years ago, Abraham would have heard of it previously. Indeed, we must say, G-d performed a miracle for them in that they were visited with children in their old age. This is the sense of the verse, Milcah, she also. In the words of our Rabbis, it is said³⁹⁵Yalkut Shimoni Numbers, 746. See the complete quote in my Hebrew commentary, p. 127. that Milcah was visited with children as was her sister Sarah.³⁹⁶Iscah, Milcah’s sister (above, 11:29), is another name for Sarah. (Rashi, ibid.)

She also gave birth. Avraham was told that if he did not wish to take Rivkah for his son, Re’umah also had a daughter — Ma’achoh — who was fitting to be Yitzchok’s wife.