Hebrews 6:15

15 Abraham waited patiently for a long time. In the end, he received what God had promised to give him.

6:15Abraham and his wife wanted a son. But they could not have a child, and they were becoming very old. Then God promised to give Abraham a son, and many grandchildren. See Genesis 12:2; 13:16; 15:4. Even though it was difficult to believe that he would have children, Abraham believed what God said.