Genesis 25:21-24 records the discovery of the birth of the twins of Isaac and Rebekah. If you read carefully, you would learn that Rebekah was barren and Isaac prayed to the Lord God for her to be fruitful and she conceived (Genesis 25:21), but she was not blessed once, but doubly. When Rebekah conceived, she enquired of the Lord God who informed her that she had two nations in her womb and that there were twins in her womb. God did not bless her with one, but two.

Points to ponder:
When we seek the Lord God, be not surprised if out of our barrenness, he chooses to bless us not once, but doubly. Seek God and his kingdom first, and all things will be added unto you (maybe even doubly – if it is in the permissive will of the Lord).

Genesis 25:21-24 (KJV)
21 And Isaac intreated the Lord for his wife, because she was barren: and the Lord was intreated of him, and Rebekah his wife conceived.
22 And the children struggled together within her; and she said, If it be so, why am I thus? And she went to enquire of theLord.
23 And the Lord said unto her, Two nations are in thy womb, and two manner of people shall be separated from thy bowels; and the one people shall be stronger than the other people; and the elder shall serve the younger.
24 And when her days to be delivered were fulfilled, behold, there were twins in her womb.