Abraham and Sarah laughed

Explaining a joke is like dissecting a frog. You understand it better but the frog dies in the process. ~ E.B. White

(טו) וַיֹּ֤אמֶר אֱלֹקִים֙ אֶל־אַבְרָהָ֔ם שָׂרַ֣י אִשְׁתְּךָ֔ לֹא־תִקְרָ֥א אֶת־שְׁמָ֖הּ שָׂרָ֑י כִּ֥י שָׂרָ֖ה שְׁמָֽהּ׃ (טז) וּבֵרַכְתִּ֣י אֹתָ֔הּ וְגַ֨ם נָתַ֧תִּי מִמֶּ֛נָּה לְךָ֖ בֵּ֑ן וּבֵֽרַכְתִּ֙יהָ֙ וְהָֽיְתָ֣ה לְגוֹיִ֔ם מַלְכֵ֥י עַמִּ֖ים מִמֶּ֥נָּה יִהְיֽוּ׃ (יז) וַיִּפֹּ֧ל אַבְרָהָ֛ם עַל־פָּנָ֖יו וַיִּצְחָ֑ק וַיֹּ֣אמֶר בְּלִבּ֗וֹ הַלְּבֶ֤ן מֵאָֽה־שָׁנָה֙ יִוָּלֵ֔ד וְאִ֨ם־שָׂרָ֔ה הֲבַת־תִּשְׁעִ֥ים שָׁנָ֖ה תֵּלֵֽד׃ (יח) וַיֹּ֥אמֶר אַבְרָהָ֖ם אֶל־הָֽאֱלֹקִ֑ים ל֥וּ יִשְׁמָעֵ֖אל יִחְיֶ֥ה לְפָנֶֽיךָ׃ (יט) וַיֹּ֣אמֶר אֱלֹקִ֗ים אֲבָל֙ שָׂרָ֣ה אִשְׁתְּךָ֗ יֹלֶ֤דֶת לְךָ֙ בֵּ֔ן וְקָרָ֥אתָ אֶת־שְׁמ֖וֹ יִצְחָ֑ק וַהֲקִמֹתִ֨י אֶת־בְּרִיתִ֥י אִתּ֛וֹ לִבְרִ֥ית עוֹלָ֖ם לְזַרְע֥וֹ אַחֲרָֽיו׃ (כ) וּֽלְיִשְׁמָעֵ֘אל שְׁמַעְתִּיךָ֒ הִנֵּ֣ה ׀ בֵּרַ֣כְתִּי אֹת֗וֹ וְהִפְרֵיתִ֥י אֹת֛וֹ וְהִרְבֵּיתִ֥י אֹת֖וֹ בִּמְאֹ֣ד מְאֹ֑ד שְׁנֵים־עָשָׂ֤ר נְשִׂיאִם֙ יוֹלִ֔יד וּנְתַתִּ֖יו לְג֥וֹי גָּדֽוֹל׃ (כא) וְאֶת־בְּרִיתִ֖י אָקִ֣ים אֶת־יִצְחָ֑ק אֲשֶׁר֩ תֵּלֵ֨ד לְךָ֤ שָׂרָה֙ לַמּוֹעֵ֣ד הַזֶּ֔ה בַּשָּׁנָ֖ה הָאַחֶֽרֶת׃

(15) And God said to Abraham, “As for your wife Sarai, you shall not call her Sarai, but her name shall be Sarah. (16) I will bless her; indeed, I will give you a son by her. I will bless her so that she shall give rise to nations; rulers of peoples shall issue from her.” (17) Abraham threw himself on his face and laughed, as he said to himself, “Can a child be born to a man a hundred years old, or can Sarah bear a child at ninety?” (18) And Abraham said to God, “O that Ishmael might live by Your favor!” (19) God said, “Nevertheless, Sarah your wife shall bear you a son, and you shall name him Isaac; and I will maintain My covenant with him as an everlasting covenant for his offspring to come. (20) As for Ishmael, I have heeded you. I hereby bless him. I will make him fertile and exceedingly numerous. He shall be the father of twelve chieftains, and I will make of him a great nation. (21) But My covenant I will maintain with Isaac, whom Sarah shall bear to you at this season next year.”

(ט) וַיֹּאמְר֣וּ אֵׄלָׄ֔יׄוׄ אַיֵּ֖ה שָׂרָ֣ה אִשְׁתֶּ֑ךָ וַיֹּ֖אמֶר הִנֵּ֥ה בָאֹֽהֶל׃ (י) וַיֹּ֗אמֶר שׁ֣וֹב אָשׁ֤וּב אֵלֶ֙יךָ֙ כָּעֵ֣ת חַיָּ֔ה וְהִנֵּה־בֵ֖ן לְשָׂרָ֣ה אִשְׁתֶּ֑ךָ וְשָׂרָ֥ה שֹׁמַ֛עַת פֶּ֥תַח הָאֹ֖הֶל וְה֥וּא אַחֲרָֽיו׃ (יא) וְאַבְרָהָ֤ם וְשָׂרָה֙ זְקֵנִ֔ים בָּאִ֖ים בַּיָּמִ֑ים חָדַל֙ לִהְי֣וֹת לְשָׂרָ֔ה אֹ֖רַח כַּנָּשִֽׁים׃ (יב) וַתִּצְחַ֥ק שָׂרָ֖ה בְּקִרְבָּ֣הּ לֵאמֹ֑ר אַחֲרֵ֤י בְלֹתִי֙ הָֽיְתָה־לִּ֣י עֶדְנָ֔ה וַֽאדושם זָקֵֽן׃ (יג) וַיֹּ֥אמֶר יי אֶל־אַבְרָהָ֑ם לָ֣מָּה זֶּה֩ צָחֲקָ֨ה שָׂרָ֜ה לֵאמֹ֗ר הַאַ֥ף אֻמְנָ֛ם אֵלֵ֖ד וַאֲנִ֥י זָקַֽנְתִּי׃ (יד) הֲיִפָּלֵ֥א מֵיי דָּבָ֑ר לַמּוֹעֵ֞ד אָשׁ֥וּב אֵלֶ֛יךָ כָּעֵ֥ת חַיָּ֖ה וּלְשָׂרָ֥ה בֵֽן׃ (טו) וַתְּכַחֵ֨שׁ שָׂרָ֧ה ׀ לֵאמֹ֛ר לֹ֥א צָחַ֖קְתִּי כִּ֣י ׀ יָרֵ֑אָה וַיֹּ֥אמֶר ׀ לֹ֖א כִּ֥י צָחָֽקְתְּ׃

(9) They said to him, “Where is your wife Sarah?” And he replied, “There, in the tent.” (10) Then one said, “I will return to you next year, and your wife Sarah shall have a son!” Sarah was listening at the entrance of the tent, which was behind him. (11) Now Abraham and Sarah were old, advanced in years; Sarah had stopped having the periods of women. (12) And Sarah laughed to herself, saying, “Now that I am withered, am I to have enjoyment—with my husband so old?” (13) Then the LORD said to Abraham, “Why did Sarah laugh, saying, ‘Shall I in truth bear a child, old as I am?’ (14) Is anything too wondrous for the LORD? I will return to you at the same season next year, and Sarah shall have a son.” (15) Sarah lied, saying, “I did not laugh,” for she was frightened. But He replied, “You did laugh.”