So Abraham ran back to the tent and said to Sarah, "Quick! Get three measures of your best flour, and bake some bread."
References for Genesis 18:6
Then Abraham ran out to the herd and chose a fat calf and told a servant to hurry and butcher it.
When the food was ready, he took some cheese curds and milk and the roasted meat, and he served it to the men. As they ate, Abraham waited on them there beneath the trees.
"Where is Sarah, your wife?" they asked him. "In the tent," Abraham replied.
Then one of them said, "About this time next year I will return, and your wife Sarah will have a son." Now Sarah was listening to this conversation from the tent nearby.
And since Abraham and Sarah were both very old, and Sarah was long past the age of having children,
she laughed silently to herself. "How could a worn-out woman like me have a baby?" she thought. "And when my master -- my husband -- is also so old?"
Then the LORD said to Abraham, "Why did Sarah laugh? Why did she say, 'Can an old woman like me have a baby?'
Is anything too hard for the LORD? About a year from now, just as I told you, I will return, and Sarah will have a son."
Sarah was afraid, so she denied that she had laughed. But he said, "That is not true. You did laugh."
Then the men got up from their meal and started on toward Sodom. Abraham went with them part of the way.