[166] [cap.31] He laughed then very naturally, even though laughter did not as yet appear to have been scattered among the human race: and not only did he laugh but the woman also laughed; for it is said presently, "And Sarrah laughed in herself, saying, There has never up to the present time come any good unto me of its own accord without care on my part; but he who has promised is my Lord, and is older than all creation, and him I must of necessity believe."