'Laughing' in the Bible

Then Abraham went down on his face, and laughing, said in his heart, May a man a hundred years old have a child? will Sarah, at ninety years old, give birth?

And Sarah, laughing to herself, said, Now that I am used up am I still to have pleasure, my husband himself being old?

And the Lord said, Why was Sarah laughing and saying, Is it possible for me, being old, to give birth to a child?

Then Sarah said, I was not laughing; for she was full of fear. And he said, No, but you were laughing.

And Sarah said, God has given me cause for laughing, and everyone who has news of it will be laughing with me.