In the first aliyah we find out that Sarah Imanu, Yitzchak's mother, has passed away. Rashi comments on the words used by the Torah to describe her age: that at one hundred, she was without sin as a twenty year-old, and at twenty, she was as beautiful as a girl of seven.
This aliyah then gives a detailed account of Avrohom purchasing the cave of Machpella for 400 shekels of silver. It is interesting to note, that the Cave of Machpella (Chevron), the site of Bais Hamikdash bought by King David, and the city of Shchem, bought by Yakov and later used to bury Yosef-- were all paid for, but yet all are contested today.
