11 By faith even Sarah herself received power to conceive seed when she was past age, since she counted him faithful who had promised:
Hebrews 11:11 Cross References - ERV
Genesis 17:17-19
17 Then Abraham fell upon his face, and laughed, and said in his heart, Shall a child be born unto him that is an hundred years old? and shall Sarah, that is ninety years old, bear?
18 And Abraham said unto God, Oh that Ishmael might live before thee!
19 And God said, Nay, but Sarah thy wife shall bear thee a son; and thou shalt call his name Isaac: and I will establish my covenant with him for an everlasting covenant for his seed after him.
Genesis 18:11-14
11 Now Abraham and Sarah were old, [and] well stricken in age; it had ceased to be with Sarah after the manner of women.
12 And Sarah laughed within herself, saying, After I am waxed old shall I have pleasure, my lord being old also?
13 And the LORD said unto Abraham, Wherefore did Sarah laugh, saying, Shall I of a surety bear a child, which am old?
14 Is any thing too hard for the LORD? At the set time I will return unto thee, when the season cometh round, and Sarah shall have a son.
Genesis 21:1-2
Luke 1:36
36 And behold, Elisabeth thy kinswoman, she also hath conceived a son in her old age: and this is the sixth month with her that was called barren.
Romans 4:20-21
Hebrews 10:23
23 let us hold fast the confession of our hope that it waver not; for he is faithful that promised: