Genesis 17:17 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?

Genesis 17:19 And God said, Sarah thy wife shall bear thee a son indeed; and thou shalt call his name Isaac: and I will establish my covenant with him for an everlasting covenant, and with his seed after him.

Genesis 21:6 ¶And Sarah said, God hath made me to laugh, so that all that hear will laugh with me.

Genesis 21:7 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.

Genesis 21:12 ¶And God said unto Abraham, Let it not be grievous in thy sight because of the lad, and because of thy bondwoman; in all that Sarah hath said unto thee, hearken unto her voice; for in Isaac shall thy seed be called.

Romans 9:7 Neither, because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed be called.

Acts 7:8 And he gave him the covenant of circumcision: and so Abraham begat Isaac, and circumcised him the eighth day; and Isaac begat Jacob; and Jacob begat the twelve patriarchs.

Joshua 24:3 And I took your father Abraham from the other side of the flood, and led him throughout all the land of Canaan, and multiplied his seed, and gave him Isaac.