Abraham and Sarah is told by the LORD and two Angels that they will be having a son and his name shall be called Isaac, Sarah hears the conversation between Abraham and the LORD while she is in the tent and she laughs within but denied laughing because she was afraid.

The next year the LORD visits Sarah like He promised and she had given birth to a son, the miracle was the fact that she was Old, Passed the age of childbirth, and She was barren, yet the Lord opened her womb and blessed her.

lesson: The birth of the promised son
scriptures: Genesis 18:9-15; 21:1-7