Did Sarah have faith that she would conceive?
Yes, she had faith.
Through faith also Sara herself received strength to conceive seed, and was delivered of a child
when she was past age, because she judged him faithful who had promised.
Hebrews 11:11
No, she laughed at God.
Sarah thy wife shall have a son. And Sarah heard it in the tent door, which was behind him. Now Abraham and Sarah were old and
well stricken in age; and it ceased to be with Sarah after the manner of women. Therefore Sarah laughed within herself, saying, After
I am waxed old shall I have pleasure, my lord being old also? And the LORD said unto Abraham, Wherefore did Sarah laugh, saying, Shall
I of a surety bear a child, which am old? Is any thing too hard for the LORD? At the time appointed I will return unto thee, according
to the time of life, and Sarah shall have a son. Then Sarah denied, saying, I laughed not; for she was afraid. And he said, Nay; but
thou didst laugh.
Genesis 18:10-15
