And Abraham called the name of his son, whom Sara bore him, Isaac.

Genesis 21:6,12 And Sara said: God hath made a laughter for me: whosoever shall hear of it will laugh with me. . . .

Genesis 17:19 And God said to Abraham: Sara thy wife shall bear thee a son, and thou shalt call his name Isaac, and I will establish my covenant with him for a perpetual covenant, and with his seed after him.

Genesis 22:2 He said to him: Take thy only begotten son Isaac, whom thou lovest, and go into the land of vision; and there thou shalt offer him for an holocaust upon one of the mountains which I will shew thee.

Joshua 24:3 And I took your father Abraham from the borders of Mesopotamia: and brought him into the land of Chanaan: and I multiplied his seed,

Matthew 1:2 Abraham begot Isaac. And Isaac begot Jacob. And Jacob begot Judas and his brethren.

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

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

Hebrews 11:18 (To whom it was said: In Isaac shalt thy seed be called:)