Kabbalah zu Jeschijahu 51:1

Because Abraham and Sarah did not cling to the Sitra Achra, Sarah earned supernal life for herself, her husband, and her son after her. This is the meaning of the verse: "Look at the rock whence you are hewn [Abraham], and to the hole of the pit from which you were dug out [Sarah]" (Isaiah 51:1). Therefore, it is written, "And Sarah's life was...", for she merited all the years. It is not so for the rest of the women,"And Chavah's life was..." and so on. Sarah clung to life. Therefore, her life was her own.