Now Abraham and Sarah were old and well stricken in age; and it ceased to be with Sarah after the manner of women.
Narrative context establishing the advanced age of Abraham and Sarah before the announcement of Isaac's birth.
Genesis 18:11
King James Version (public domain)
Traditionally attributed to Moses · c. 13th century BC · The Pentateuch — Genesis, Exodus, Leviticus, Numbers, and Deuteronomy — is traditionally attributed to him
Context
9And they said unto him, Where is Sarah thy wife? And he said, Behold, in the tent.
10And he said, I will certainly return unto thee according to the time of life; and, lo, Sarah thy wife shall have a son. And Sarah heard it in the tent door, which was behind him.
11Now Abraham and Sarah were old and well stricken in age; and it ceased to be with Sarah after the manner of women.
12Therefore Sarah laughed within herself, saying, After I am waxed old shall I have pleasure, my lord being old also?
13And the LORD said unto Abraham, Wherefore did Sarah laugh, saying, Shall I of a surety bear a child, which am old?