'Laughed' in the Bible

Then Abraham fell upon his face, and laughed, and said in his heart, Shall a child be born unto him that is a hundred years old? and shall Sarah, that is ninety years old, bear?

And Sarah laughed within herself, saying, After I am waxed old shall I have pleasure, my lord being old also?

Then Sarah denied, saying, I laughed not; for she was afraid. And he said, Nay; but thou didst laugh.