suck.. proof that "God", the Creator, had renewed her youth, showing why Abimelech should have taken her (Genesis 20:2). Sarah's Magnificat may be compared with Mary's. The scenes of both near to each other. Mary's words (Luke 1:54; Luke 1:55) connect her "mercy" with that shown to "Abraham and his seed",
Related Commentaries of Genesis 21:7
Genesis 21:7
7 And she said, Who would have said unto Abraham, that Sarah should have given children suck? for I have born him a son in his old age.